284 C. H. TYLER TOWNSEND. 



may be distinguished by a lighter yellowish pollen or pubes- 

 cence on the thorax. Pollenia may be differentiated from the 

 two other genera by its straight, almost vertical face, and the 

 epistoma or oral margin being scarcely prominent. As to 

 Conipsoinyia, it may be injudicious to attempt to maintain it 

 separately from Calliphora, but it can always be told by the 

 yellowish vittse of the thorax, though the general coloring varies 

 from gold-green through green to steel-blue, and even purplish. 



NOTES OK 9fORTH AMERICAN TACHINID.E, WITH 

 DESCRIPTIONS OF NEW SPECIES.— Paper VII 



BY C. H. TYLER TOWNSEND. 



The present paper gives descriptions of ten new species of Ta- 

 chinidse, which are interesting from the fact that they are all bred 

 species. Seven of these were bred from various Lepidoptera, either 

 from the larva or the cocoon ; and three were bred from saw-fly 

 (Tenthredinid) larvse. 



A DECADE OF PARASITIC TACHINID^. 



Tacliiiia orgyiie n. sp. 9 ■ — Eyes light brown, bare; front one-tbinl width 

 of head, frontal vitta blackish, hardly oue-fourth width of front, two orbital 

 bristles directed forward (not counting two bristles behind them directed back- 

 ward); frontal bristles descending half way down sides of face; sides of front 

 golden, face and cheeks silvery white; facial ridges bristly less than half way 

 up, vibrissse inserted above oral margin; antennse and arista blackish, second 

 antennal joint slightly rufous at end, third joint hardly twice as long as second : 

 liroboscis brownish, palpi elongate, rufous, thickened throughoul ; occiput silvery 

 or cinereous, thickly gray hairy. Thorax silvery, with four well-defined black 

 vittse, the outer ones a little the heavier, and a narrow median one which is ob- 

 solete anteriorly ; humeri and pleurte silvery white ; scutellum rufous or testa- 

 ceous, black at base. Abdomen shining black, silvery white pollinose, except 

 scutum of first and hind margins of other segments, second segment slightly 

 reddish on sides; first and second segments with a lateral macrochseta or two, 

 and a median marginal pair; third with a marginal row, and anal covered, ex- 

 cept at base, with weaker niacrochsetse. Legs black, femora silvery white, espe- 

 cially front pair, middle and hind tibiae with spiny bristles, claws and pulvilli 

 only a little elongate, pulvilli tawny fuscous. Wings grayish hyaline, veins 

 brown : tegulse white ; halteres fuscous, rufous at base. Length of body 8.5 mm. ; 

 of vying 7 mm. 



■■ Paper I was published in Proc. Ent. Soc. Wash, ii; papers II and III, in 

 Trans'. Am. Ent. Soc. xviii and xix; paper IV, in Ent. News, iii ; papers Y and 

 VI in Can. Ent. xxiv. 



