Casey — A Revision of the American Paederini. 51 
wider than the head, parallel, the punctures coarse, deep, sparse and 
serially arranged; abdomen distinctly narrower than the elytra, feebly 
and very sparsely punctate. Male with the fifth ventral unmodified, 
the sixth with a triangular, gradually formed emargination, fully half 
as wide as the apex and fully as deep as wide, with the angle not very 
obviously rounded, the surface along the sides and before the notch 
sometimes very feebly impressed. Length 8.0 mm.; width 1.28 mm. 
North Carolina (Asheville)............+- vececeeeeeees-Serpentina Lec. 
I was fortunate enough to find two males of this species in 
the mountains of western North Carolina some years ago. 
There is undeniably a rather closer relationship in many im- 
portant features between Hesperobium cribratum and rubri- 
penne and this species than there is between those species and 
the normal species of Hesperobium, but on account of the 
formation of the pleural fold of the elytra and side margin of 
the pronotum, as stated above, the two former are attached 
for the present to Hesperobium. It may, however, ultimately 
be deemed more proper to consider Lissobiops as a subgenus 
of Hesperobium and assign to it the three species, serpentina, 
cribrata and rubripennis. 
Biocrypta n. gen. 
This genus is more closely related to Gastrolobium than to 
Hesperobium, because of the tridentate mandibles and the 
fact that the second or third ventral bears sexual marks, not 
of the same character as in the former genus, however, but 
distinctly different as may be seen from the description given 
below. These facts lead to the query whether it would not 
be preferable to base the generic characters of the subtribe 
primarily upon dentition of the mandibles, rather than upon 
the presence or absence of a pleural fold of the elytra. The 
type of Biocrypta differs completely in facies from any 
known form of Gastrolobium, and its fusoid form suggests 
rather Hesperobium at first glance, but in the form of the head 
it differs radically from either; it may be described as 
follows : — 
Fusiform, rather stout and only feebly convex, pale and uniform red- 
brown in color throughout the body, legs and antennae, the head and 
