222 LIST OF DIPTERA. 



veins bordered with brown; poisers tawny, with piceous knobs. 

 Length of the body 3 lines ; of the wings 6 lines. 

 a. Florida. Presented by E. Doubleday, Esq. 



Thereva germana, n. s. Fusca, capite cinereo subtus albo, thoracis 

 vittis duabus lateribus pectoreque cinereis, abdomine nigro-argen- 

 teo micante, antennis nigris, pedibus fulvis, alis subcinereis. 



Head gray behind, white in front and beneath, when it is 

 thickly clothed with white hairs : eyes red : feelers and mouth 

 black, the former clothed wilh black bristles, the latter with white 

 hairs : chest dark brown, with two slender gray stripes ; its sides 

 and the breast also gray, and the latter thickly clothed with white 

 hairs : abdomen black, covered with silvery glance ; hind border of 

 each segment clothed with yellowish white hairs : hips gray, clothed 

 with white hairs: thighs and shanks tawny, armed with black 

 bristles; feet darker, clothed with black hairs, tips of the joints 

 black : wings slightly gray ; brands brown ; veins piceous, slightly 

 bordered with brown in the disk of the wing ; a black dot just above 

 the cross-veins near the tip of the wing ; poisers ferruginous, with 

 piceous knobs. Length of the body 3 lines ; of the wings 6 lines. 



Var. /3. Tips of thighs and of shanks darker : wing-veins not 

 bordered with brown. 

 a. Florida. Presented by E. Doubleday, Esq. 



Thereva vicina, n. s., mas. Fusca aut nigra, capite nigro, abdomine 

 cinereo fasciis fulvis apice nigro, antennis nigris, pedibus cinereis, 

 tibiis fulvis, tibiis anticis tarsisque piceis,tarsis posterioribus basi 

 nonnunquam fulvis alis limpidis. 



Head black, with a few black bristles above, thickly clothed 

 with white hairs behind and beneath : eyes red : feelers and mouth 

 black, thinly clothed with short black hairs : chest and breast brown, 

 the former clothed with gray hairs and black bristles, the latter with 

 white hairs : abdomen dark gray, clothed with hoary hairs ; hind 

 border of each segment tawny ; last segment black, shining: hips 

 and thighs gray, clothed with white hairs ; shanks tawny, darker at 

 the tips ; feet and fore shanks piceous : wings colourless : brands 

 brown and narrow ; veins piceous ; poisers piceous, with ferruginous 

 knobs. Length of the body 3-J — 4 lines ; of the wings 6| — 7 

 lines. 



Var. /3. Chest and breast black: hind borders of only the 

 second and the third abdominal segments tawny ; four hinder feet 

 tawny at the base. 

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



