576 



Adult; Male. — Color, pale lemon-yellow and black. 



Head lemon-yellow and metallic black ; mouth-parts buff, the 

 median lobe with a wide cleft which is obtuse at the proximal end; 

 antennae dark brown except the proximal segment, which has a pale 

 stripe from the base to the apex ; postclypeus shining black ; anteclypeus 

 pale ; labrum with a transverse black stripe on the dorsal margin, the 

 remainder yellow ; exposed portions of the mandibles, their trochantins, 

 the genae, and the front above the f ronto-clypeal suture to the antennal 

 fossae, yellow ; remainder of the front and the vertex metallic bronze 

 with the exception of very small postocular spots, a small yellow 

 spot ventrad of the median ocellus, and a narrow yellow stripe caudad 

 of the ocellar area. 



Thorax greenish yellow and metallic black; cephalic lobe of the 

 pronotum with a yellow transverse stripe ; median lobes metallic black ; 

 caudal lobe black with three short marginal dashes; noto-epimeral 

 suture indistinct; dorsal carina of the mesothorax feebly developed, 

 the mesothorax largely black with a narrow yellow line just dorsad 

 of the mesopleural suture ; dorsal half of the mesosupraepisterna black ; 

 metepisterna and epimera yellow or buff; paraptera trapezoidal, the 

 cephalic margins with a pale line ; coxae pale yellow, the femora pale, 

 with dorsal black stripes widened distad ; tibiae pale, with short, prox- 

 imal, dorsal and ventral dark stripes, the tarsi and claws pale except 

 at the tips ; setae of the front femora few, about three in each row, the 

 distance between them much greater than their length ; wings (Figs. 82, 

 83) very short ; postnodal cross-veins six in the front wing and five in 

 the hind ; M 2 arising near the third postnodal vein in the front wing 

 and between the second and third in the hind wing ; stigma of the front 

 wing ovoid, remote from the margin, the stigma of the hind wing 

 rhomboidal and in contact with the margin of the wing. 



Abdomen yellow and orange, the black confined to longitudinal 

 dorsal bands on terga 1-3 and six, the stripe on three and the one on 

 six being conspicuously widened subapically; basal and apical black 

 spots present on the fourth and fifth terga, and a dorsal stripe on seven 

 which is about three-fourths the length of the segment ; the narrow 

 basal ring on segments 1-7 is interrupted on the meson in all except 

 the first; tenth tergum with a dorsal process about as long as the 

 segment and bifurcate at the apex; anal appendages (Figs. 166, 167) 

 small, the superiors bifurcate, and with a broad mesal lobe extending 

 caudo-ventrad and a conical lateral one projecting caudad; inferiors 

 conical, slightly longer than the superiors. 



