158 THOMAS SAY FOUNDATION 



No. 74. Sarcophaga helicis Towns. 



Townsend, Psyche, vi, 220, 1892. — Ohio, bred from Helix 



thyroides. 

 Coquillett, Proc. Acad. Nat. Sci. Phil, 1895, 317 (Heli- 

 cobia) ; Proc. U. S. N. M., xxii, oc. in Porto Rico 

 (id.). 

 Howard, Insect Life, vi, 372, bred from Loxostege sticti- 



calis. 

 Townsend„ Psyche, vi, 468, 1893, reared by Forbes in 

 Ilhnois from Lachnosterna sp., Fontia rapac, and 

 Heliophila unipuncia. 

 Morgan, Bull. 30, n. ser., Div. of Entomology, 1901, 25, 



bred from Melanoplus differentialis in Mississippi. 

 Washburn, Diptera of Minnesota (Bull 93, Minn. Exp. 

 Sta.), 143, reared from Melanoplus atlanis in Minn. 

 Pratt, Canad. Ent., xliv, 181, 1912, bred from cow ma- 

 nure in Texas. 

 Kelly, Jour. Agr. Research, ii, 441, bred from grasshop- 

 pers at Wellington, Kan. 

 Aldrich, Jour. Econ. Ent., viii, 245, summary of rearings. 

 Male. Front .215 of hccad (average of five, — 

 .192, .211, .211, .219, .241) ; parafrontals and para- 

 facials silvery, the latter narrow with the usual row 

 of hairs which are bristle-like below; frontal bristles 

 about 7, only descending to the base of the second an- 

 tennal joint, moderately divergent; antennte black, 

 the third joint almost twice the second, reaching 

 three-fourths of the way to the vibrissiE, which are at 

 oral margin; arista with ordinary plumosity; palpi 

 and proboscis black, ordinary; bucca one-fifth eye- 

 height; back of head with three rows of black hairs 

 and rather numerous white ones around the neck and 

 below. 



Thorax gray pollinose, with the usual three to 

 five black stripes ; ps dc three ; ant acr absent or very 

 rudimentary; prsc rather small; stpl 3; scutellum 

 with 2 pairs of marginals (second very long) ; pre- 

 apical short, apical rather small but distinct. 



Abdomen black and silvery, with strong tessel- 

 lation and indications of three changeable black 

 stripes; hind edge of fourth segment red; first and 

 third segments with only lateral bristles; third with 

 an interrupted row; fourth with a row of about 12. 



