1048 LIST OF DIPTERA. 



much longer than the chest : legs black, clothed with short black 

 hairs ; shanks ferruginous, pitchy towards the tips, beset with black 

 bristles ; feet pitchy ; foot-cushions tawny ; claws black : wings 

 slightly gray, tawny at the base and along the borders of the veins ; 

 wing-ribs and veins tawny ; veins darker towards the tips ; lower 

 cross-vein pitchy, nearly straight and perpendicular, distant by less 

 than its length "from the hind border, by twice its length from the 

 middle cross-vein, and by thrice its length from the tip of the wing; 

 poisers tawny. Length of the body 2j lines ; of the wings 4 lines. 

 a. New York. Presented by E. Doubleday, Esq. 



Calobata, Fabr. 



Calobata petronella, Fabr. Syst. And. 262, 10. Meig, Dipt. v. 

 377, 1. Macq. Hist. Nat. Dipt. ii. 490, 2. Zett. Ins. Lapp A, 

 756, 2. Musca petronella, Linn. Syst. Nat. ii. 994. Faun. 

 Suec. 1856. Gmel. Ed. Syst. Nat. i. 5, 2850, 96. Fabr. Sp. 

 Ins. ii. 447, 57. Ent. Syst. iv. 336, 103. Schell. Gen. Mouth, 

 pi. 6,f. 2. Schrank, Ins. Austr. 646. Turt. iii. 611. Calo- 

 bata corrigiolata, Fall. Opomyz. 2, 3. 



a. England. 



Calobata Alesia, n. s., mas. et fern. Nigra, nitens, capite abdomi- 

 nis mari. apice antennis pedibusque fulvis, tibiis obscurioribus, 

 femoribus apice fusco cinctis, alis limpidis. 

 Nearly allied to C. petronella, but the legs are rather shorter, 

 and the bands on the thighs are narrower. Body black, shining : 

 head and chest beset with a few black bristles : head prominent, 

 tawny in front and beneath ; sides of the face without bristles ; epi- 

 stoma not prominent : eyes red ; fore part rather flat, its facets 

 larger than those elsewhere : sucker tawny, clothed with pale hairs ; 

 palpi yellow : feelers bright tawny, much shorter than the face ; 

 third joint conical, longer than the second; bristle black, clothed 

 with short hairs, stout at the base, about thrice the length of the 

 third joint: abdomen linear, a little narrower than the chest and 

 nearly twice its length ; tip and appendages of the male tawny : 

 legs tawny, rather long, clothed with very short tawny hairs ; claws 

 with black tips ; fore thighs yellow ; a brown band at the tip of 

 each hind thigh ; hind shanks of the male brown, of the female 

 dark tawny : wings colourless, rather short ; wing-ribs and veins 

 tawny ; fore border pitchy towards the tip : third and fourth longi- 

 tudinal veins approaching each other in the latter part of their 

 course, the fourth forming a very slight angle at its junction with 



