96 MR. HALDEMAN'S DESCRIPTIONS OF COLEOPTERA. 



fuliginous ; margins of the abdominal segments sometimes fulvous. Rather smaller 

 than the preceding, to which it is closely allied ; but besides the darker colour of the 

 elytra and abdomen, the lateral margins of the prothorax are more convex. Both 

 species sometimes possess a dark frontal spot. Lake Superior, and the north-eastern 

 part of Maine. 



XANTHOCHROA Sclimidt. Linn^a entomologica, i. 17. 



X. viTTATUS Saij. Ins. from New Orleans. Nacerda dorsalis Mels., Proceed. 

 Acad. Nat. Sci. iii. 55. 



DITYLUS Fischer. Schmidt, Lin. ent. i. 24. 

 D. c^RuLEUs Randall, (Upis.) Bost. J. Nat. Hist, vol. ii. p. 20. 



NACERDES Steven.— ^. Schmidt, Lin. ent. i. 28. 



N. MELANURA Lin. (Cantharis) — notata F. (Necydalis) ii. 371. Inhabits Europe, 

 North America, and South Africa. 



ASCLERA Schmidt. Lin. ent. i. 38.* 



A. LATERALIS Mels. (Naoerda.) Proceed. Acad. iii. 54. A. ekgans\T)G]. 

 Pennsylvania and Carolina. 



A. siGNATicoLLis HttM. Brownish cinerous ; prothorax black, widest anteriorly, 

 the sides projecting before the middle, surface irregular and minutely scabrous, 

 medial impressed line dilated at both ends ; anterior and posterior medial portion, 

 with the front and scutel, yellowish fulvous pubescent; clypeus corneous; elytra 

 minutely scabrous and finely pubescent, with two obsolete costse. 4 1. long. Georgia. 

 A. signaticollis\De]. 



A. prjjNCTicoLLis Saij. (Oederaera.) J. Acad. iii. 273. A. macidicollis\.T)ei. 

 Missouri, New York, and Lake Superior. 



A. RUFicoLLis Sai/. (Oedemera.) J. Acad. iii. 271. Carinata Newman, Ent. Mag. 

 v., coslipennis\.De]. Black, prothorax bright rufous, distinctly cordate, depressed 

 above, with three dilated impressions, one medial posteriorly, and another more 

 deeply impressed upon each side of the middle anteriorly, the three forming an 

 equilateral triangle ; elytra brown, minutely scabrous, each with three raised costse. 

 3 1. long. Pennsylvania, Carolina, Missouri. 



A. NOTOxoiDES F. Black, prothorax rufous varying to flavous, a black longitudinal 

 spot at the posterior angles, and a dot anteriorly upon each side above, the latter 



♦ This author has not named one of his characterized genera, (Lin. ent. i., 90,) which in my lists of genera and 

 spacies I have called StenaxiJea. 



