46 
Psyche 
[March 
cheeks black, occiput brassy brown above, becoming yellow- 
ish grey on the sides and below. Antennae brownish, the 
ventral portion reddish orange. Arista brownish black, the 
antennal pile black. Thorax: with a broad median bluish 
grey shining vittae, and lying outside of it, first a pair of dark 
brown vittae, then a pair of somewhat yellowish vittae, and 
bordering the continuous yellow side markings are a pair of 
wide brown vittae. Pleurae yellow on the posterior margin of 
the mesopleurae and upper part of sternopleurae. Scutellum 
metallic black, the margin pale yellow. Abdomen : black 
marked with light yellow, sides of the first segment and its 
narrow margin, a complete transverse stripe on the second 
segment that reaches the sides, its anterior corners narrowly, 
and traces of a median vittae, all yellow. Third segment with 
a median yellow vittae which does not quite reach the poste- 
rior margin and on either side of it two basal yellow spots. 
The outermost pair subrectangular, occupying the corners 
and narrowly confluent at the base with the submedial much 
larger spots which are twice as long as the more lateral ones. 
The submedial spot on inner surface is strongly indented and 
the black encroaches upon it, but only upon the basal half 
of its medial surface. Fourth segment with almost identi- 
cally similar pattern. Fifth segment with large yellow spots 
on the basal corners and a pair of widely separated elongate, 
yellow spots broadly reaching the base of the segment with 
the posterior ends rounded and very slightly approximated. 
Legs : pale yellow, the hind tarsi, basal two-thirds of hind 
tibiae and a wide black annulus apically upon the hind fe- 
mora, black. Wings: pale grey, stigma pale brown. 
Holotype female. Barro Colorado Island, Canal Zone, 
Aug. 25, 1937. Hull coll. 
Mesogramma elongata n. sp. 
Male. Length 13 mm. Head: face and front yellow, the 
antennae brownish yellow, third joint slightly darker dor- 
sally, cheeks shining blackish, upper part of vertex brilliant 
violet, giving way to steel blue just behind the ocelli, area 
between the ocelli golden brown, lower part of the frontal 
triangle greyish pubescent. Occiput yellowish grey pubes- 
cent. Thorax: mesonotum with a broad bluish grey median 
stripe divided posteriorly by a narrow steel stripe the greater 
