222 THOMAS SAY FOUNDATION 



All the specimens agree exactly in this one-sided ar- 

 rangement which is unique in the genus as far as I 

 have seen. Fifth sternite yellow, narrowly excised, 

 the two sides close together for almost the whole 

 length, then diverging, near the point of divergence 

 with an indefinite black brush of short hairs. 



Legs black ; middle femur with short comb below 

 near apex. Middle tibia not villous, with two bristles 

 on the outer front side; hind tibia with only a few 

 erect villous hairs on the inner and outer sides. 



Wings hyaline, a distinct but not very large cos- 

 tal spine; third segment of costa as long as fifth and 

 sixth. First vein bare; third hairy almost to the 

 crossvein. 



Length 8-10 mm. 



Twenty-three males; fifteen from Mr. F. C. 

 Bishopp, collected at various points in Texas, and one 

 from Paul's Valley, Okla. ; three from Greenwood, 

 Miss. (C. F. Turner, No. E 96) ; one specimen from 

 12760) ; one Greensboro, Fla., reared from the large 

 lubber grasshopper, Dictyophorus reticulatus, by II. 

 !N". Wilson (Gainesville, No. 16587) ; one specimen 

 from Cameron, La., collected by Prof. Hine in 1903; 

 two specimens from Tifton, Ga., in the Hough col- 

 lection. 



I have not so far been able to separate the females 

 of this species from those of rohusta coming in group 

 II. Some of the Texas material was collected in traps 

 baited with stale beer, and the lining membranes from 

 the intestines of animals, obtained from the slaughter 

 house where the intestines were made into sausage 

 casings. One lot was bred from beef refuse at Vic- 

 toria, Texas, by J. D. Mitchell. Mr. E. G. Kelly 

 reports that the Big Cabin specimen was reared from 

 pupas of Heliophila umpimeta, which were living when 

 placed in the cage. 



Holotype.— Male, No. 20549, U. S. N. M., from 

 Galveston, Texas, collected about decaying fish on 

 the beach (Bishopp No. 3516). 



