JAMES CHESTER BRADLEY 189 



b). Examine the petioles of pluto (type of Xeophofopsis), 

 imperialis (type of Photopsis) , exogyrus (type of Odontophotopsis) , 

 helicaon (Photopsis), and albicinda (Photopsis). These are all 

 supposed to be sessile and to belong to the Mutillinae. Com- 

 pare with them the petioles of pennsylvanica ( = scaeva, type of 

 Sphaerophthalma) , lepeletierii (a Dasymutilla), and the male of 

 waco (type of Pycnomutilla) . These three are placed by Dr. 

 Ashmead in the Ephutinae, characterized by petioliform first 

 segments. 



c) . Compare the e^-es of the female grandiceps (tj-pe of Myr- 

 milloides) and the female of canadensis (type of Pseudomethoca) 

 with simillima or viontivaga (one of which is doubtless the female 

 of sanbornii, type of Xomiaephagus). In Nomiaephagus the 

 eye is supposed to be "small, rounded, hemispherical or ellip- 

 soidal, prominently convex, smooth and highly polished, not 

 facetted or with the facets vaguely defined" and therefore to 

 belong to the tribe Photopsidini. The two former (i. e. grandiceps 

 and canadensis), are supposed to have their eyes "larger, not 

 rounded or hemispherical, ovate, obovate or ellipsoidal, always 

 distinctly facetted." Do the specimens carry out the distinction, 

 if there be any? Is the distinction as stated a wise one for the 

 recognition of two tribes? Before deciding about the facetting, 

 compare a number of specimens of each species and also of 

 ivaco, propinqua, and nana (in the latter two the}' are supposed 

 not to be facetted). Compare the eyes of the males of the first 

 mentioned species, including sanhoj-nii. 



d). Compare the eyes of exogyrus (tj'pe of Odontophotopsis) , 

 pluto (type of Neophotopsis), nana (type of MicroniutUla) , and im~ 

 perialis (type of Photopsis) , all of which are supposed to have the 

 eyes "small, rounded, etc.," (and all of which really have ex- 

 traordinarily large, bead-like eyes) with the males of grandiceps 

 (type of Myrmilloides) and canadensis (type of Pseudomethoca), 

 in both of which they are said to be "larger, not rountled, etc." 

 The reverse as to size is most emphatically the case. Further- 

 more the eyes of nana are strongly facetted, although placed in 

 the Photopsidini where they are supposed not to be. 



e). Examine the mandibles of sanbornii (type of Nomiae- 

 phagus) and of hexar (probable male of harmonia, type of Bruesia). 



TBANS. AM. ENT. SOC, XLII. 



