768 LIST OF DIPTERA. 



is yellow and hardly prominent ; sides of the face fringed with 

 bristles on half the length from the base : eyes red, not hairy : 

 sucker black, pitchy, and clothed with tawny hairs at the tip ; palpi 

 tawny, beset with black bristles : feelers black, as long as the face ; 

 tip of the second joint ferruginous; third joint long, linear, trun- 

 cated at the tip, about thrice the length of the second joint ; bristle 

 much longer than the third joint, its first joint very short, second 

 joint moderately long, third joint stout for more than one-third of 

 the length, very slender from thence to the tip : chest adorned with 

 four slender black stripes ; scutcheon tawny : abdomen obconical, a 

 little longer than the chest, adorned with hoary lustre, which has a 

 yellowish tinge ; this lustre disappears on the hind borders of the 

 segments, which are armed with long black spines ; a large ferrugi- 

 nous spot on each side of the second segment: legs black, clothed 

 with black hairs and bristles ; claws pitchy, with black tips ; foot- 

 cushions tawny : wings slightly gray, whitish at the base; wing- 

 ribs tawny; veins black, tawny towards the base ; four spines on the 

 third longitudinal vein ; tip cross-vein forming a very slightly ob- 

 tuse angle with the fourth longitudinal vein which projects far be- 

 yond it, very slightly curved inward near the base, straight from 

 thence to the tip, joining the border at some distance above the tip 

 of the wing ; lower cross-vein very slightly curved inward ; scales 

 white, with yellow borders. Length of the body 5 lines ; of the 

 wings 10 lines. 

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



Tachina Lucagus, n. s. Cinerea, capite argenteo, thorace nigro qua- 

 driviitato, abdomine fasciis interruptis canis, palpis fulvis, an- 

 tennis pedibusque nigris, alls cinereis. 



Body black, clothed with black hairs and bristles : head adorned 

 in front with silvery lustre, clothed beneath with a few hoary hairs ; 

 crown tawny about the eyelets and on each side, the middle part 

 being occupied by a black stripe between the eyelets and the feelers; 

 no bristles on the sides of the face ; epistoma hardly prominent : 

 eyes red, not hairy : sucker black, clothed at the tip with pale tawny 

 hairs ; palpi tawny, slender, beset with black bristles : feelers black, 

 as long as the face ; tips of the first and of the second joints ferru- 

 ginous ; third joint linear, slender, more than twice the length of the 

 second, nearly truncated at the tip ; bristle much longer than the 

 third joint, its first joint obsolete; second joint short; third joint 

 rather stout though tapering for nearly half its length, very slender 

 from thence to the tip : chest covered with gray bloom, which is in- 

 terrupted by four slender black stripes : abdomen obconical, not 

 longer than the chest, adorned on the fore borders of the segments 



