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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



long with the first segment 11/2 times the length of 

 the second; both bear nmnerous, appressed setae or 

 short bristles ventrally, and a few dorsally at the apex. 

 The third segment is slender, no wider than the sec- 

 ond segment, slightly narrowed beyond the middle and 

 nearly twice as long as the combined length of the first 

 two segments. At its apex it bears a short microseg- 

 ment followed by a greatly shortened and thickened 

 style fully as wide as the microsegment and only about 

 as long as the second antennal segment; its apex is 

 tipped with a bristle. 



Head, anterior aspect : The head is nearly as wide as 

 the thorax, but only a little wider than high. The face 

 below the antenna is less than a tenth the head width, 

 slightly narrowed on the upper half and then diverging 

 on the lower portion. Its surface is pubescent with a 

 subocular row of longer, appressed pubescence and 

 pile is absent, except for 7 or 8 quite short, fine, bristly 

 hairs on the lowest fourth. On this same area are 2 

 pairs of exceptionally long, remarkably fine bristles and 

 above the epistomal margin a cluster of 6, with 2 others 

 placed laterally beside them on each side. There are, 

 moreover, 2 pairs of slender bristles on the sides of the 

 oblique subepistoma. Front small, short and poUinose, 

 with 2 subocular bristles on each side and a row of 4 

 others placed just medial to the subocular row. The 

 front is slightly divergent, with the vertex a little nar- 

 rowed. The moderately large ocellarium has vertical 

 sides and is set forward and bears a pair of short bristles 

 behind the ocelli. The vertex is only moderately exca- 

 vated in front, but is more deeply excavated behind. 



Thorax : The mesonotum is moderately high, gently 

 convex over the middle, more sti"ongly arched anteriorly 

 and posteriorly. Its surface is poUinose, mostly dark 

 in color, with unusually reduced pile. There is an 

 acrostical row of appressed bristly hairs, partly dou- 

 bled, widely separated fi'om a single row of slightly 

 longer, anterior, dorsocentral hairs. Before the suture 

 these begin to become longer and at and behind the 

 suture contain 3 pairs of quite long, slender bristles. 

 Humerus with 4 or 5 fine hairs. The lateral comple- 

 ment of bristles, for the most part long and moderately 

 stout, contains 2 or 3 weak, short, posthumeral, 2 long, 

 notopleural, 1 supraalar, 1 postalar, and 1 scutellar pair 

 of bristles. The convex scutellum is not very thick, but 

 has a distinct, impressed rim, 6 pairs of setae on the 

 margin, and 2 setae on each side of the disc. The pro- 

 notum carries 2 pairs of slender bristles and some bristly 

 pile. Upper mesopleuron with 1 hair, the posterior 

 margin with 3 or 4 hairs, a like number on the sterno- 

 pleuron and 8 to 10 hairs on the upper pteropleuron ; 

 also there is 1 stout and 1 slender bristle and 3 or 4 

 hairs on the posthypopleuron, a few quite slender, 

 bristly hairs and a little other pile on the metapleuron. 

 The metanotal callosity is prominent, it is creased be- 

 hind, and bears ventrally a tuft of stiff hairs. The 

 whole metanotum is unusually high and poUinose. The 

 metasternum is pilose, the postmetacoxal area mem- 



branous; prosternum fully dissociated; whole surface 

 of the pleuron poUinose. 



Legs: All the femora and tibiae are comparatively 

 elongate, especially the middle and hind pairs with 

 the hind pan- of legs longest of any. The pile is com- 

 paratively scanty, very fine, subappressed and setate. 

 Bristles are conspicuous but only moderate m quantity. 

 The hind femur bears 3 lateral bristles on the basal half, 

 no ventrolateral elements but near the base and at the 

 middle an exceptionally long, ventromedial bristle. 

 Dorsally at the subapex there is on either side a con- 

 spicuous bristle but none at apex. The hind tibia bears 

 3 doi-solateral, 1 stout element being at the base; also 

 1 long, dorsomedial beyond the middle, besides 2 distal 

 ventrolateral bristles. Middle femur with a stout, an- 

 terior bristle near the middle and 2 stout, anteroventral 

 bristles on the basal half; likewise, 2 or 3 ventral 

 bristles on the basal half and 1 posterodorsal near the 

 apex. Middle tibia carries only a weak bristle doreally 

 beyond the middle, 3 long, conspicuous anteroventral 

 bristles, a similar bristle posteroventrally beyond the 

 middle, and a posterior bristle on the basal third. The 

 anterior femur has 3 prominent bristles ventrally on 

 the basal lialf ; its tibia has a weak bristle doreally in 

 the middle and 3 remarkably long posteroventral 

 bristles, basally stout and attenuate. Anterior basitar- 

 sus as long as the next tliree segments ; the hind basitar- 

 sus is long as the next four segments. Apex of liind 

 tibia with 6 bristles. The hind femur is slightly nar- 

 rowed towards the base. Claws slender, sharp ; the pul- 

 viUi and empodium well developed. 



Wings : The marginal cell is closed with a long stalk. 

 The anterior branch of the third vein ends at the apex 

 of the whig; the posterior branch ends a considerable 

 distance behind the apex, and except apically the 

 whole submarginal cell is narrow. Fourth posterior 

 cell closed and stalked, the anal cell likewise. Alula 

 large, the ambient vein complete. 



Abdomen : The abdomen is slender, elongate and sub- 

 cylindrical, the pile is imusually scanty, subappressed 

 and setate, the pollen so faint that the abdomen appears 

 to be sliming. Conspicuous though slender bristles are 

 present along the subposterior margins on the lateral 

 third of each tergite and consist of 2 or 3 pairs on each 

 segment. Females have seven segments clearly sep- 

 arated from the ovipositor ; the eighth tergite is as long 

 as its basal width and a little narrowed apically ; it is 

 shieldlike, overlapping the corresponding reduced 

 sternite, and from above, with its terminal bristles, it 

 appears like an ordinai-y segment. It may properly 

 be regarded as part of the ovipositor. The ninth seg- 

 ment is subtriangular, about half as long as the preced- 

 ing segment and broad with only the lateral margins 

 curved downward. The tenth segment is moderately 

 elongate and a little compressed laterally. No males 



seen. 



Distribution : Neotropical : Leinendera rubra Carrera 



(1945). 



