178 THOMAS SAY FOUNDATION 



30. Distal segment of the penis short and very broad 

 and blunt, a curved hornlike process at each 

 outer apical angle (widespread) 



No. 110. hullata Park. 

 Distal segment wide, but lacking the hornlike 

 processes and provided with some long api- 

 cal ones (Montana) 



No. 111. libera n. sp. 



No. 80. Sarcophaga villipes V. d. W. 



Van der Wiilp, Biologia, Dipt., ii, 269, male and female ; 

 pi. vii, f. 2, 1895. — Mexico, Northern Sonora and 

 Guerrero. 



Of this species I have only the female, but it 

 seems readily recognizable. 



Female. General color bluish gray or glaucous. 

 Front .407 of head; frontal bristles only about 7, the 

 rows wide apart, not diverging below, and reaching 

 only a little beyond the base of the second antennal 

 joint; ocellars large; outer vertical well developed. 

 Parafrontals rather hairy, with bluish-gray pollen, 

 which spreads over most of the frontal stripe; para- 

 facials more shining gray pollinose, with the usual 

 row of hairs, which are slender; antenme black, third 

 joint double the second, reaching four-lifths to the 

 vibrissa?, which are at the oral margin ; arista plumose 

 barely to the middle; proboscis and palpi black, or- 

 dinary; bucca one-third the eyeheight; back of head 

 with several rows of black hairs, the very few pale 

 ones difficult to see. 



Thorax densely bluish gray pollinose, with the 

 usual 3 to 5 black stripes ; the submedian graj^ stripes 

 divided before the suture ; ps dc 4 ; ant dc 3 ; ant acr ; 

 presc very minute ; sa 3 ; int al 2 ; pa 2 ; stpl 2 ; npl 3 ; 

 scutellimi with 2 marginal and one discal. 



Abdomen glaucous pollinose, not very change- 

 able, with an indistinct median dark stripe; first and 

 second segments with only lateral bristles; third with 

 a median marginal pair and two laterals ; fourth with 

 a marginal row of 10 or 12. Genital segment gray, 



