18 PROCEEDIlSrGS OF THE ISTATIOlSrAX, MUSEUM vol. 74 



All coxae and femora metallic green ; fore coxae with a few small 

 pale hairs; tips of femora and ail tibiae yellow, posterior tibiae a 

 little brownish at tip on outer side, their tarsi yellow at base ; pulvilli 

 of fore tarsi a little enlarged ; posterior basitarsi with a long curved 

 bristle below near the base, fully three-fourths as long as the joint; 

 joints of fore tarsi as 5 8-22-1 5-9-T ; of middle ones as 51-23-16- 

 7-6; those of posterior pair as 37-24^-15-8-7; the long bristles of 

 hind basitarsus as 28. Calypters and halteres yellow, the former 

 with black cilia. Wings grayish; third and fourth veins each bent 

 away from the other beyond the cross vein, becoming more parallel 

 toward their tips; last section of fifth vein 33, cross vein twenty- 

 fiftieths of a millimeter long; first vein not reaching beyond one- 

 third of the distance to tip of second vein. 



FennuJe. — Very much like the male, except that the third and 

 fourth veins are almost exactly parallel beyond the cross vein; the 

 face is distinctly divided near the middle, and there is no spine on 

 lower surface of hind basitarsi. 



Type and allotype^ taken by J. M. Aldrich, April 14 and 15, 1926, 

 at La Providencia, Obispo, Guatemala. Three pcuratypes were taken 

 by Nathan Banks in the Panama Canal Zone; one male on Taboga 

 Island, June 29, 1924 ; one female at Barro Colorado Island, and one 

 female at Fort Sherman, July 3, 1924. 



Type.— Male, Cat. No. 41034, U. S. N. M. This would run to dm- 

 plex Aldrich, which is very much like it, but this differs in having the 

 spine of lower surface of posterior basitarsi much longer and curved 

 not erect as in smiplex^ and the third and fourth veins are not so 

 much bent as in that species. 



DIAPHORUS PERPLEXUS, new species 



Male. — Length 3.5 mm. Face and front green, of nearly equal 

 width, the former slightly narrowed below and covered with white 

 pollen; front shining with only a little yellowish pollen. Antennae 

 wholly black, third joint evenly rounded at tip, twice as wide as long; 

 arista apical. PaljDi black with white pollen. Lower orbital cilia 

 white. 



Thorax green, a little dulled with yellowish pollen. Abdomen 

 shining green with bronze reflections, last two segments more blue, 

 its hair black. Hypopygium conspicuous but small, its appendages 

 small. 



All coxae and femora black with green reflections, their tips and 

 the trochanters yellow; a few minute pale hairs on fore coxae and 

 one black bristle at tip ; fore femora with a row of black hairs below, 

 which are short, except at base; tibiae yellow, posterior pair brown 

 at tip ; fore and middle tarsi from the tip of first joint and most of 



