198 MEMOIRS ON THE COLEOPTERA. 



3 Sinus of the sixth ventral ( 9 ) about four or five times as wide as deep, 

 evenly rounded in an arc which has somewhat the form of a very broad 

 and obtuse parabola; sixth ventral (c?) with the ligula convex, smooth, 

 long and parallel, its apex only moderately oblique from angle to angle 

 but strongly arcuate sinistrally and thence straighter and more oblique 

 to the angle at the right: prothorax not quite so transverse and rather 

 more evidently narrower than the base of the elytra than in testaceus. 

 Long Island, Pennsylvania (near Philadelphia), Virginia (Norfolk) 

 and North Carolina luteus n. sp. 



Sinus of the sixth ventral (9) still shallower, forming a broad even circular 

 arc from side to side; it is seven or eight times as wide as deep; ligula 

 of the sixth ventral (cf) of a very different kind from any of the pre- 

 ceding species, being flat, gradually and obtusely, subobliquely acu- 

 minate behind, short, broad basally and with a short acute longitudinal 

 fold at apex on the left side; general outline and sculpture as in luteus 

 and testaceus, but with the elytra relatively a little smaller and the ab- 

 domen darker red-brown in color, nearly as in contortus. Texas (Browns- 

 ville), Wickham fraternus n. sp. 



4 Form only a little more slender than in testaceus and almost exactly 

 resembling that species and luteus in form, coloration and sculpture, 

 though perhaps just visibly smaller in size; sixth ventral (9) broad 

 and broadly, transversely truncate at apex, the truncature with a minute 

 and very shallow, gradually formed sinus at the middle; chitinous portion 

 of the last antennal joint materially wider than the tenth, but only very 

 slightly longer; abdomen barely at all darker, luteous. Nicaragua 

 (San Marcos), C. F. Baker invidus n. sp. 



Form notably more slender but similar in coloration and sculpture, the elytra 

 smaller though similarly proportioned, the prothorax shorter and more 

 transverse, about as wide as the elytral base and, as usual in this group, 

 with its sides rounded and converging but little from apex to base; sixth 

 ventral (9) more trapezoidal than in invidus and more narrowed at 

 apex, where it is truncate in a straight transverse line and rather less 

 than half as wide as at base; ligula of the sixth ventral (cT) narrower 

 than in testaceus, luteus and other similar species, and with the apex 

 oblique in contrary sense or from the right anteriorly to the left, its 

 surface concave and gradually more elevated at the right edge; size 

 a little smaller, the form much narrower than in invidus and especially 

 than in testaceus and luteus. Texas (Brownsville), Wickham. 



timidus n. sp. 



The following species is wholly luteous, with a darker and more 

 red-brown abdomen as in testaceus and related forms, but the pro- 

 thorax is relatively much smaller and more strongly narrowed from 

 apex to base : 



Palaminus hudsonicus n. sp. Not quite so slender as testaceus, and with 

 the elytra still more developed, strongly, loosely punctate, the head evidently 

 wider than the porthorax, the latter not more than a fourth or fifth wider 

 than long, the sides broadly arcuate and strongly converging from apex to 



