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) serpentina Lee. 



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 Hesperohium cribratwn and rubri- 

 penne and this species than there is between those species and 

 the normal species of Hesperohium, 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 Hesperohium. It may, however, ultimately 

 be deemed more proper to consider Lissohiops as a subgenus 

 of Hesperohium and assign to it the three species, serpentina, 

 crihrata and ruhripennis. 



Biocrypta n. gen. 



This genus is more closely related to Gastrolohium than to 

 Hesperohium, 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 Gastrolohium, and its fusoid form suggests 

 rather Hesperohium 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 



