AMERICAN COLEOPTERA. 123 



late, the antennse of the male are much longer, the hind trochanters 

 S are not produced and the arcuate fascia of the elytra in a different 

 position. I have adopted Newman's unpublished name for a Florida 

 species which doubtless belongs to this, which I am by no means 

 satisfied was properly referred to transversatus Chev., (Leo. Proc. Am. 

 Philos. Soc. 1878, p. 414). 

 Three specimens % , Florida. 



li. argeutatus Duval.— Form narrower and less depressed than aculifer, 

 surface densely clothed with greyish white pubescence, elytra with a slight 

 cloud at the sides and a short transverse nearly black fascia crossing the suture 

 at the declivity. Antennae one and a half times the length of body % and nearly 

 as long 9. Thorax distinctly subangulate at the sides, an obtuse tubercle 

 above the angulation, disc with five flat tubercles, median line slightly elevated 

 and denuded, surface densely clothed with greyish white pubescence and a 

 short brown line on each side of middle beginning at apical margin sometimes 

 denuded. Elytra with four rows of feeble tubercles, an oblique post-humeral 

 impression, apices obliquely truncate. Body beneath less densely clothed than 

 above. Length .38 inch; 9.5 mm. 



Resembles aculifer but is more elongate as well as more convex. 

 It differs in the less asperate surface, the longer antennae and by the 

 hind trochanter of % not spiniform. 



This species was originally described from Cuba. It occurs in 

 Florida and also at Nassau, N. P. 



I.IOPUS Serv. 



To this genus must be referred those species now included in our 

 lists in Sternidius Lee. The vague manner in which Lacordaire 

 describes the form of the mesosternum is misleading and caused the 

 separation of this portion of the genus under a new name. 



All the species referred to Liopus in the "Classification" and 

 "Check List" should be placed in Lepturges, excepting L. hignttatus 

 Lee, which is GrapJiisurus pusillus Kby., concerning which remarks 

 will be found elsewhere. 



Liopus is closely related to Leptost^lus, but after a careful study of 

 all the species in our fauna I find that Liopus has always an acute 

 thoracic spine always behind the middle, the prosternum is usually 

 narrow, the mesosternum gradually narrowed behind, truncate at tip 

 and not dilated; the antennae are always longer than the body and 

 the joints from 5 — 11 are very nearly equal in length. Leptosti/his 

 has never more than a very obtuse tubercle on the side of the thorax 

 a little behind the middle, the prosternum is broad and channeled, 

 the mesosternum broader than long, more or less emarginate at tip 

 and slightly dilated behind the coxae; the antennae are less slender 



