780 LIST OF DIPTERA. 



Tachina prisca, n. s. Cana, angusta, thorace vittis qnatuor nigris, 

 abdominis segmentorum marginibus posticis vittaque dorsali 

 nigris, palpis nigris, antennis ferrugineis apiee nigris , pedibus 

 fulvis long is, alis limpidis. 



Body hoary, slender, clothed with black hairs and bristles : 

 head clothed beneath with white hairs ; a pitchy stripe between the* 

 eyelets and the feelers; epistoma not prominent: sides of the face 

 without bristles except at the base : sucker pitchy, clothed with 

 tawny hairs ; palpi long, black, beset with black bristles : feelers fer- 

 ruginous, nearly as long as the face ; third joint black, ferruginous 

 at the base, which is convex above where the feelers are inserted, flat 

 above, hardly convex beneath, truncated at the tip, more than thrice 

 the length of the second joint; bristle twice the length of the third 

 joint, its first and second joints very short, with tawny tips ; third 

 rather stout for one-third of the length, very slender from thence to 

 the tip : chest adorned with four black stripes : abdomen oval, not 

 longer than the chest ; first segment, hind borders of the following 

 segments and a middle stripe black •. legs tawny, long and slender ; 

 feet black; foot-cushions tawny: wings colourless, long; wing-ribs 

 and veins tawny ; tip cross-vein forming near the wing border an 

 obtuse angle with the fourth longitudinal vein, very slightly curved 

 inward, joining the border a little above the tip of the wing ; lower 

 cross-vein slightly curved inward near the base, indistinctly waving 

 from thence to the tip ; scales white, with very pale yellow borders. 

 Length of the body 4 lines ; of the wings 9 lines. 

 a. Nova Scotia. From Lieut. Redjnan's collection. 



Tachina invaria, n. s. Nigra, fulvo tecta, capite antice subtusque 

 albo, ventre cano, palpis antennis pedibusque nigris, alis subci- 

 nereis basi subfuscis. 



Body black, covered with pale tawny bloom, clothed with black 

 bairs and bristles: head white in front and beneath ; a black stripe 

 fringed with bristles between the eyelets and the feelers : sides of the 

 face fringed with bristles at the base ; epistoma and sides of peris- 

 toma tawny, the former not prominent: eyes dark red, not hairy: 

 sucker and palpi black : feelers black, as long as the face ; third 

 joint linear, slender, obliquely truncated at the tip, about twice the 

 length of the third joint, its first joint obsolete : second very short ; 

 third tapering from the base to the tip : scutcheon and abdomen 

 armed with long black spines : abdomen obconical, a little longer 

 than the chest, somewhat hoary beneath ; legs black, clothed with 

 black hairs and bristles ; foot-cushions tawny : wings slightly gray, 

 tinged with brown at the base ; wing-ribs pitchy; veins black, pitchy 

 towards the base ; tip cross- vein straight till near the tip, where it 



