276 MR. walker's catalogue of dipterous insects 



cante, pedibus halteribusque rufescentibus, tarsis anticis femoribusque 

 nigris, alls cinereis. 

 Male. Piceous. Head hoary behind and beneath. Eyes divided into 

 two distinct parts; 1st part reddish, composed of large facets which 

 successively decrease in size towards each side ; 2nd part geneous, on 

 each side of the face, composed of excessively small facets. Antennae 

 black, reddish at the base ; 3rd joint with an extremely minute horn. 

 Pectus hoary. Abdomen conical, reddish, blackish towards the tip 

 and on the disk beneath. Legs reddish ; femora, except the tips and 

 fore tarsi, black. Wings cinereous ; veins black, reddish towards the 

 base ; fore branch of the cubital vein simple, forming a much-rounded 

 angle near the base; halteres pale reddish. Length of the body 5 

 lines ; of the wings 9 lines. 



21. Tabanus INSURGENS, n. s. Mas. Lsete fulvus, antennis parvis, 

 abdomine conico elongato, tarsis anticis nigris, alis obscure cinereis, 

 halteribus pallide fulvis. 



Male. Bright tawny. Eyes uniform, composed of very minute facets. 

 Proboscis blackish towards the tip. Antennae short, slender, with 

 hardly any horn. Abdomen conical, very much longer than the tho- 

 rax. Fore tarsi black. Wings dark cinereous ; veins black, tawny 

 towards the base ; fore branch of the cubital vein curved and not an- 

 gular near the base ; halteres pale tawny. Length of the body 4 

 lines ; of the wings 9 lines. 



Geu. Chrysops, Ileigen. 



22. Chrysops signifer, n. s. Mas. Niger, capite atro aureo-to- 

 mentoso, antennis elongatis basi fulvis, thorace fasciis duabus aureo 

 pilosis, abdomine flavo fasciis tribus apiceque nigris, femoribus ob- 

 scure rufis, tibiis dilatatis, tarsis posterioribus fulvis, alis cinereis costa 

 fasciisque duabus nigricantibus. 



Male. Black. Head deep black and shining in front, with a patch of 

 gilded tomentura on each side of the face, and with a smaller one at 

 the base of the antenna;. Antennae filiform, tawny towards the base, 

 much longer than the breadth of the head. Thorax with two bands 

 of gilded hairs. Abdomen yellow, blackish at the tip, with a black 

 band at the base, and in the middle with two black bands, which are 

 connected on each side and enclose a triangular space between them. 

 Femora mostly dark red ; tibiae dilated ; posterior tarsi tawny. Wings 

 cinereous, blackish along the costa, and with two blackish bands ; the 

 2nd very much broader than the first, which is near the base. Length 

 of the body 4 lines; of the wings 7 lines. 



23. Chrysops parallelus, n. s. F(£m. Piceo-niger, linearis, ca- 

 pite atro nitente, antennis obscure rufis, ])edibus piceis, alis nigris 

 ])ostice cinereis macula discali punctoque basali albis. 



Female. Piceous black, linear. Head deep black, very shining. An- 



