REVISION OP STREPSIPTERA PIERCE. 143 



Type. — In Mr. Dury's collection. 



Dedicated to Charles Dury, of Cincinnati, Ohio, in return for the 

 many favors he lias rendered the writer and in acknowledgment of 

 the new species in the group which he has discovered. 



19. Genus EUPATHOCERA Pierce (1908). 



Name derived from eu7tadi)i- (sensitive) + dpac; (horn), meaning 

 sensitive antenna, referring to the characteristic sensitive surface of 

 the strepsipteran antennae. 



Wings with eight primary veins; with two distal detached veins 

 between the radius and medius, and one detached vein between the 

 medius and cubitus; postlumbium very short, transverse, and not 

 differing in consistency from the scutellum or post-scutellum. 



Type of genus. — Eupathocera lugubris Pierce. The genus is typically 

 parasitic on Sphex (the old genus Ammophila) , and is typically North 

 American, although European species have been added because of 

 congeneric hosts. 



i. EUPATHOCERA LUGUBRIS Pierce (1908). 



Acroschismus lugubris Pierce, MS. (Dury, 1906.) 



Host. — Sphex {Ammophila) fragilis Smith; Cincinnati, Ohio, Sep- 

 tember 3, October 2; Charles Dury, collector (pi. 10, figs. 11, 12, 14). 



Hale. — Length 2.25 mm. Head and thorax jet black; antennae, 

 legs, and abdomen brown; wings snowy white, venation almost invisi- 

 ble. Head transverse, vertex medianly produced in a high ridge, on 

 each side of which arise the antennae; antennae typically xenid; man- 

 dibles chitinous, flattened, scimitar-like; palpi two-jointed, black. 

 Scutellum anteriorly acute angled, reaching praescutum; postlum- 

 bium very short, transverse, and not differently colored or of different 

 consistency from the surrounding parts. CEdeagus almost as in 

 Ophthalmochlus. 



In Acroschismus the scutellum sends forward a narrow stem to meet 

 the praescutum and has the postlumbium more than one-fourth as 

 long as wide and of a different color and consistency from the sur- 

 rounding parts. 



Type. — In Mr. Dury's collection. 



2. EUPATHOCERA PRUINOS/E, new species. 



Host. — Sphex {Ammophila) pruinosa Cresson; Canyon City, Colo- 

 rado, August; Denver, Colorado; J. S. Hunter, collector; from col- 

 lection of the University of Nebraska (pi. 11, fig. 7). 



Female. — Length of cephalothorax over 1.05 mm., breadth at spira- 

 cles 1.17 mm., breadth of head 0.95 mm., distance between mandibles 

 0.16 mm. Cephalothorax dark brown except toward base on disk; 



