32 Mr. C H. T. Tovvnsend on Diptera 



17. Penthosia saianica^ Bigot. 



Penthosia satanica, Bigot, van der Wulp, Tijdsclir. v. Ent. xxxv. (1892) 

 pp. 189-190. 



One male, July 4, and two females, July 5 and 6. San 

 Kafael, on flowers of tlic Gordia sp. 



Length of male 10^, of females 11^ millim. 



The frontal bristles extend well below the antennae, but 

 there is no row of hairs on each side of face except these. 

 The first and second antennal joints are about equal, taken 

 togetlier they are about as long as width of front at vertex ; 

 the third joint is greatly elongated, being four or five times 

 as long as the second, whicli is not by any means very short. 

 In the male especially the third joint is widened distally and 

 is subtruncate at tip. Arista nearly as long as third antennal 

 joint. Thorax is not " densely pilose," but whole thorax, 

 abdomen, and legs are well and quite thickly clothed with 

 short hair. The only long macrochatte are on the scutellura. 

 Foot-claws of male long and nearly straight, of female 

 shorter and hooked at tip. The only light colouring on this 

 entire insect is the silvery-white poUinose stripe extending 

 from middle of front on each side down to cheeks. It is 

 interrupted below base of antennce. Even this looks blackish 

 in certain lights. Otherwise the entire insect is black, even 

 to the pulvilli and wings, the latter, however, having a 

 purplish lustre. 



18. Saundersia rufopilosa, v. d. W. 

 Saundersia rufopilosa, v. d. W., Biol. Centr.-Am., Dipt. ii. p. 22. 



Two male specimens of this beautiful species, San Kafael, 

 March. Heretofore recorded only from Guatemala and Costa 

 Eica. 



Length 11-12^ millim. 



First two antennal joints rufous. Mesoscutum deep golden 

 pollinosc, rather than cinereous. I should certainly call the 

 frontal bristles strong, not " rather weak." Pilosity of 

 occiput deep golden yellow. Second and third antennal 

 joints same length. Pilosity of mesoscutum short, black. 

 The three black dorsal spots of abdomen, on median line of 

 second, third, and fourth segments, not coalesced, entire. 

 Bristles on coxa^ and underside of femora either wholly 

 yellow or wholly black. Alulets golden fulvous, the tegulie 

 laintly tinged with fuscous. 



