NO. 2130. NORTH AMERICA RHAPHIDOPBORINAE—CAUDELL. 



673 



of the male is essentially like that of cercalis, described and figured 

 below (fig. 17). The dorsal surface of the abdomen of the male is 



Fig. 15.— Peistoceuthophilus tuberculatus. Dorsum of abdomen of adult male type. 



characteristic in armature, being furnished with large stout spines 

 and four conspicuous smooth elevated areas, some of which are 

 higher than broad (fig. 15). The hind femora of this species are not 



Fig. 16. — Pristoceuthophilus hjbeeculatus. IIind leg of male type. 



distinctly ampliate beneath as in celatus but armed about the same 

 as in that species (fig. 16). 



PRISTOCEUTHOPHILUS CERCALIS, new species. 



Description. — Head with the frontal horn very well developed, as 

 characteristic of the genus, but scarcely as long and acute as in celatus 

 (fig. 11); antennae not very long, apparently but little longer than 

 the insect itself. Thoracic segments smooth in both sexes. Abdo- 

 men of the female smooth, of the male with all the segments, except 

 one or two of the terminal retractile ones, densely covered above on 

 the posterior haK or more with large rounded tubercles. Legs mod- 

 erately stout; hind femora miarmed above in both sexes and also 

 beneath in the female except for a few very minute serrations, mostly 

 on the inner margin ; in the male the hind femora are armed ventrally 

 on both margms with several distant short sharply pointed triangular 

 serrations, with some much more minute ones between them, and one 

 81022°— Proc.N.M.vol 49—15 43 



