DESCRIPTIONS OF NEW SPECIES. 1C7 



species agrees with Oxacis dorsalis in the form of the mandibles 

 and palpi, but the ungues are strongly toothed at the base. 



477. P. lucana. Minus elongata, testacea, fusca, vel fusco-vittata, 

 subtiliter dense punctulata, tenuiter cinereo-pubescens, thorace postice 

 inodice augustato, latitudine paulo longiore, ante medium utrinque vage 

 impresso ; ore antennis pedibusque fusco-testaceis, mandibulis acutis 

 haud dentatis. Long. -22 — -3G. 



Abundant at Cape San Lucas, Lower California ; collected by 

 Mr. Xantns. This species is somewhat robust in form, resembling 

 Oxacis do7*salis. It varies much in color, being sometimes entirely 

 fuscous, sometimes testaceous, but usually the thorax is varied 

 With spots and the elytra are marked with a broad discoidal vitta, 

 and a shorter one near. the scutellum. I observe no sexual differ- 

 ences. 



LACCOtfOTUS Lec. 



4?S. L.. piinctatus. Elongatus niger, confertim punctatus, subtiliter 

 pubescens, tborace latitudine haud breviore, subquadrato, lateribus 

 antice late rotuudatis, medio subcarinato, utriuque vage foveato ; elytris 

 thorace latioribus, elongatis transversim parum convexis ; abdominis 

 segmento ventrali lmo brevi, 2ndo elongato macula magna pallida 

 signato ; antennis capite thoraceque haud longioribus, subserratis, 

 articulo 3io prsecedente sesqui longiore. Long. *17. 

 Lec. Class. Col. N. America, 255. 



One specimen, given by the Rev. D. Ziegler, as found in York 

 County, Pa. The generic characters are sufficiently detailed in 

 the work above cited. I will merely add that, although the head 

 is not prolonged into a beak, I have associated this genus with 

 Mycterus on account of the small size of the middle coxae, 1lie 

 dilatation of the penultimate tarsal joint, and the absence of the 

 lateral suture of the prothorax. The short 1st ventral segment 

 is a singular character, not found in Mycterus, nor in any of the 

 neighboring families ; the 2d ventral is nearly as long as the two 

 following united, and is tumid at the middle with the anterior 

 outline convex forwards ; a large pale yellow spot occupies the 

 whole of the middle portion ; the 5th ventral is not shorter than 

 the 4th, and is rounded at tip. 



I regard this genus a connecting form from Mycterus to Pythidse, 

 though the full development of its relationships must xlepend on 

 the discovery of other specimens. 



