748 LIST OF DIPTERA. 



stripe between the eyelets and the feelers ; underside clothed with 

 hoary hairs; sides of the face fringed with bristles along one-third 

 of the length from the base; epistoma not prominent: eyes red, not 

 hairy : sucker black, clothed at the tip with pale tawny hairs ; palpi 

 tawny, beset with black bristles: feelers black, shorter than the face; 

 second joint gray ; third joint much longer than the second, flat 

 above, slightly convex beneath, truncated at the tip; bristle full 

 twice the length of the third joint, its second joint more than twice 

 the length of the first ; third joint stout for one-third of the length 

 from the base, very slender from thence to the tip : chest adorned 

 with three indistinct black stripes: scutcheon and abdomen armed 

 with black spines : abdomen obconical, a little longer than the 

 chest ; segments grayish tawny for half the length from the base : 

 legs black, clothed with black hairs and bristles ; foot-cushions dark 

 tawny : wings light gray ; wing-ribs dark tawny ; veins black ; tip 

 cross-vein forming a very obtuse angle with the fourth longitudinal 

 vein, 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 with two very indistinct curves, the lower in- 

 ward, the upper outward. Length of the body 2f lines ; of the 

 wings 5 lines. 



a. England. 



Tachina trepida, Meig. Dipt. iv. 300, 106. Zett. Dipt. Scand. iii. 



1025, 14. Plagia trepida, Meig. Dipt. vii. 201, 3. 

 a. England. 



Tachina opaca? Meig. Dipt. iv. 313, 128. 

 a. England. 



Tachina Dydas, n. s. Nigro-cinerea, capite argeiiteo, vertice fulvo 

 thorace vittis tribus nigris, abdominis segmentoram marginibus 

 anticis fulvo micantibus, palpis fidvis, antennis pedibusque 

 nigris, alis cinereis. 



Body black, slightly covered with gray bloom, clothed with 

 black hairs and bristles, the latter especially long and stout on the 

 scutcheon and on the abdomen : head thickly clothed behind and 

 beneath with hoary hairs, adorned in front with silvery lustre, tawny 

 on the crown, where there is a pitchy stripe from the eyelets to the 

 feelers ; sides of the face fringed with bristles ; epistoma slightly 

 prominent: eyes pitchy, not hairy: sucker black, clothed at the 

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

 black, a little shorter than the face : tip of the second joint ferrugi- 

 nous ; third joint very much longer than the second, flat above, 



