358 SUPPLEMENT. 



more widely separated than usual, but connected as far back as the third vein ; the tip is largely 

 hyaline. 

 Length 7*2 millim. 



Hah. Mexico, Mieantla (F. D. G.). 

 One male. 



11. Psilopus genualis, sp. n. 



c? . Face blue, when viewed from above white-pollinose, in a certain light faintly rosaceous ; antennas small, 

 black, second joint with small bristles ; front bluish -violet. Thorax green, thinly pruinose, the sides 

 pure silvery-pollinose when viewed in the most favourable light, otherwise showing but little pollen. - 

 Tegulae black, halteres yellow. (Abdomen of the only specimen seen broken off at the second segment.) 

 Coxae and femora black, the tips of the fore and middle femora yellow. Tibiae, including the hind ones, 

 pure yellow ; fore tibiae with five or six slender erect bristles on the hinder side ; middle tibia? with a 

 close row of rather small bristles on the fore side, two or three scattered ones on the outer side, and an 

 irregular row of small ones behind ; hind tibia? with no noticeable bristles. Pore tarsi almost twice the 

 length of the tibiae, infuscated from the tip of the first joint, bearing a few small bristles on the outer 

 side of the first joint near the apex, and quite a number of smaller ones on the second joint, extending 

 its whole length ; (middle tarsi broken off) ; hind tarsi entirely black, of ordinary structure. Wings 

 subhyaline, the two cross-bands broadly connected in front, abbreviated behind ; a considerable hyaline 

 space at the tip. 



Length (estimated) 5*5 millim. 



Hob. Mexico, Chilpancingo in Guerrero (H. II Smith). 

 A single male. 



12. Psilopus purpuratus, sp. n. 



d 1 . Pace purple, rather opaque, with minute whitish dust, retreating on the upper half, then with a 

 transverse impression, and a narrow lower part that stands out at an angle, and extends far below the 

 corners of the eyes ; front broad, delicate purple in colour, not very shining, with a few small white hairs 

 on the sides ; antennae of moderate size, third joint large, second with a few small bristles, of which the 

 largest are above. Thorax green, with a delicate pruinosity over its entire surface ; the pleura? 

 beautifully silvery when viewed from above in the right light, otherwise appearing scarcely at all 

 pollinose. Halteres pale clear yellow. Abdomen bluish-green, white-pruinose, the last two segments 

 pure deep violet ; the short pile very noticeable (although the bristles are not especially large) and pale 

 on the sides near the base and on the first two-fifths of the venter ; hypopygium small, black, with two 

 small, blackish, hairy, forked appendages. Coxae and femora bluish-green, tips of the fore and middle 

 femora yellow ; tibiae yellow, the hind ones gradually infuscated in their apical third or wholly infuscated ; 

 fore tarsi faintly infuscated from the base, middle and hind ones black. The fore tibiae with several 

 long bristles on the hinder side near the base ; the middle tibiae with a number of scattered bristles, but 

 no very distinct row, except on the front side ; the hind tibiae with a few widely separated small bristles 

 on the outer side, and dense hair on the inner side. Pore tarsus double the length of its tibia, the first 

 joint as long as the tibia, with three or four bristles scattered along its outer side, the second joint with 

 some closely placed small bristles on the same side ; middle tarsus also twice as long as the tibia plain • 

 hind tarsus tapering, plain. Wings, including the apex, hyaline ; fore margin yellowish ; the usual 

 cross-bands narrow, connected in front to the third vein ; apical fork bent rather deeply into the first 

 posterior cell. 



Length 6 millim. 



Bab. Mexico, Cuernavaca in Morelos, Tepetlapa and Chilpancingo in Guerrero 

 (H. H. Smith). 



