Page 8 · Leaf Beetles (Chrysomelidae) - 1349 Species, Identification & Facts

Trirhabda schwarzi

Original description and reference Fig. 7 from Blake

California sagebrush leaf beetle

Trirhabda sericotrachyla

Identification: T. sericotrachyla is easily confused with T. luteocincta ...below they're contrasted side-by-side: T. sericotrachyla T. luteocincta T. sericotrachyla T. luteocincta T. sericotrachyla T. luteocincta T. luteocincta on left T. sericotrac

Tymnes metasternalis

Identification: Sides of metasternum densely, coarsely punctate Det. E. G. Riley, 2012

Sweet Potato Leaf Beetle

Typophorus nigritus

Identification: irridescent, tapering pronotum, and destinctive femora Of the approximately 50 genera and more than 1,000 species of Convolvulaceae, I. batatas is the only crop plant of major importance. The domestication of sweet potato occurred in

Urodera crucifera

Type Locality of Urodera texana : Fort Brown, Brownsville, Cameron County, Texas

Walterianella durangoensis

Identification: Det. E. G. Riley 2009 A second Walterianella ? This similar species, also found in AZ, has been tried if it is one known from Mexico - unsuccessfully. It probably is undescribed, and has even larger eyes, and wider pronotal margin tha

Xanthonia angulata

Identification: Elytra uniformly medium brown, immaculate (emphasis added); larger, length 3.5–4.0 mm; punctation of elytral disc subseriate; median lobe long, broad throughout length, with deep angular apical incision. Since 1990, E.G. Riley has onl

Ten-spotted Leaf Beetle

Xanthonia decemnotata

Identification: "sloppy" arrangement of the elytral setae (E. G. Riley, pers. comm. to MAQ, 2024) plus, no profemoral tooth

Xanthonia dentata

Identification: dorsal ground color dark reddish brown to medium brownish, elytra with distinct and fairly consistent pattern of black maculae Det. E. G. Riley, 2010 Type Locality: Cloudcroft, New Mex., coll'ed by Wickham 1933. Conserved in the USNM.

Xanthonia furcata

Identification: species can be tricky to identify without reference to the male genitalia; femora often with conspicuous dark spot at midlength (emphasis added) Det. E. G. Riely, 2012 Holotype: Union, Union Co., Illinois - 3 Mar 1937 - Wild cherry fo

Xanthonia hirsuta

Identification: separated from the other spp. occurring in the US by the longer and denser elytral pubescence (emphasis added). That on the elytra is all decumbent, laying close to the elytral surface, and the hairs arising from the punctures are as

Xanthonia marquai

Identification: Elytra of uniform brownish coloration, hairs uniformly pale brownish and integument of uniform medium brown color ground color of dorsum uniformly medium brownish, elytral hairs uniformly light yellow-brown, venter medium brown; ventr

Xanthonia nitida

Identification: dorsal ground color dark brown to nearly black, without obvious pattern (emphasis added) of maculae, venter dark brown to black; elytral hairs composed of erect hairs in single rows on intervals and appressed hairs arising from punctu

Lacey Oak Xanthonia

Xanthonia parva

Identification: dorsal ground color light to medium reddish brown, immaculate or nearly so Type Locality: TEXAS: Kerr Co., Kerr Wildlife Management Area, Spring Trap, IV-24-2005, Coll. E. G. Riley, beating Quercus glaucoides Paratypes. (18 total) TEX

Xanthonia picturata

Identification: Tooth of profemur moderate; venter and legs dark brownish (emphasis added), elytral dark brown with darker pattern Det. M. A. Quinn, 2013 one of the most abundant Xanthonia species in Texas, Riley examined 381 TX spmns.

Xanthonia pinicola 0

Xanthonia pinicola

Identification: The punctuation of the elytra is somewhat variable, in a certain light, in some specimens the punctures appear to form regular rows. The pubescence of the elytra is uniform, inclined as in vagans , in decemnotata dual, consisting of i

Xanthonia querci

Identification: dorsal ground color light to medium reddish brown with pattern of darker maculae, venter of body dark brown to black; pubescence of elytra composed of reclined hairs on intervals in singles rows and appressed hairs arising from punctu

Xanthonia stevensi

Identification: Variable in coloration but usually with head black, becoming dark reddish brown on front; pronotum, elytra, and venter black; legs yellowish brown with femora occasionally fuscous dorsally and apically; specimens ranging from black th

Xanthonia striata 0

Xanthonia striata

Identification: last key couplet: Pronotum with lateral margins slightly rounded and converging apically Type Locality: Hanover, Pa.

Xanthonia texana

Identification: ground color of dorsum light reddish brown, elytra ranging from immaculate to a pattern of well-defined brownish to black maculae (emphasis added) (Figs 8, 76), venter of body brownish to distinctly darkened or partially black; pubesc

Xanthonia vagans

Identification: distinctive because of large size, greatly enlarged tooth of the anterior femur, clavate anterior tibiae ground color of dorsum medium to dark brownish, elytra usually with vague dark streaks (emphasis added) enhanced by arrangement o

Xanthonia villosula

Identification: ground color of dorsum light reddish brown, usually immaculate (emphasis added) or rarely with faint indications of elytral maculae Riley et al. examined 207 total spmns from east TX

Xenochalepus chapuisi

Identification: - First US record Det. E. G. Riley, 2026 Type Locality: Oaxaca, México (Sallé)

Xenochalepus omoger 0

Xenochalepus omoger

Identification: resembles X. potomaca in color, size, and shape, but may be readily separated from the latter by the presence of the following characters. Antennal segments 3-6 relatively stout, coarsely, irregularly sulcate and carinate; a groove ov

Xenochalepus potomacus

Identification: Yellow markings consist of a spot on the vertex, a pair of broad sublateral pronotal areas confluent along anterior margin above and involving the pro-sternum below, as well as joining the small humeral spot; anterior femora yellow at

Zabrotes bexarensis

Identification: Vestiture of head white, sparsely distributed; pronotum uniformly white to white intermixed with brown, sometimes patchy; elytra (fig. 137, vol II) ranges from uniformly white to white intermixed with brown to brown with white maculat

Zabrotes chandleri

Identification: The orange and white vestitural pattern is immediately recognizable. Type locality: 3 mi north of Big Pine, California

Zabrotes densus

The three species- Z. cynthiae, Z. densus , and Z. humboldtae -are found almost entirely within California.

Mexican Bean Weevil

Zabrotes subfasciatus

pest of Phaseolus and other stored legumes (mung bean, cowpea, groundnuts)

Zenocolaspis subtropica

Identification: Note bulging eyes... Distinguished at once from the North American species, by the strongly angulate sides of prothorax. The males are smaller and much more brightly colored than the females. (Schaeffer 1906) Type series localities: B