SARCOPHAGA AXD ALLIES 139 



vided transversely, but runs out with almost parallel 

 sides to the apex, where it is notched into two sharp 

 points; back of this there is a black thickening, pro- 

 jecting out on each side encircled by a membrane, 

 which on the two sides forms almost a complete cir- 

 cle. In profile there is a short, black, stout tube pro- 

 jecting forward a little before the apex. Fifth stern- 

 ite quite retracted, V-shaped, with yellow pubescence 

 on inner edge. 



Female. Front .2.51 width of head. Palpi quite 

 long and stout. Occiput convex. Bristles of thorax 

 very stout. Second abdominal segment with erect 

 marginals as in males; third segment with interrupt- 

 ed row; fourth segment entirely black; genital seg- 

 ment pale yellow; fifth sternite pale and rounded; the 

 sixth one having a distinct sharp larvipositor which is 

 bent forward. 



Legs very bristly ; middle tibia with an increasing 

 row of bristles on the outer front side. 



Length 9 mm. 



Two males and two females; one male and one 

 female from Melrose Highlands, Mass., July 14, 

 1911 and June 23, 1909, collected by H. E. Smith 

 and J. D. Tothill respectively; one male, Glencarden, 

 Va., July 14, F. Knab (jSTational Museum) ; one fe- 

 male, Lawrence, Kan. (author's collection). 



Ilolotype (male) and allotype (female). — ^Xo. 

 20522, U. S. N. M., from Melrose Highlands, Mass. 



No. 61. Sarcophag-a coloradensis n. sp. 



Male. Characters of eoccisa except tlie follow- 

 ing: Front .159 of head; bucca one-fourth the eye- 

 height; bristles of parafacials and facial ridges un- 

 usually long; third joint of antennae one and one-half 

 times tlie second joint, reaching about tln-ee-fourths 

 of the wav to the vibrissa?. Second abdominal seg- 

 ment usually without marginal bristles but a pair is 

 present in two of tlie specimens. Fourtli abdominal 

 segment entirely black. Forceps reddish yellow, be- 

 coming black at apex; in profile with straight and 



