306 MEMOIRS OF THE CARNEGIE MUSEUM 



Antenna; 9-jointc(1, the funicle 4-joiuted Cercobelus Walker (type C.jugieus AValk.). 



Antennse 6-jointed, the funicle 3-jointed Coccobius Ratzeburg (type unknown.) 



59. Mandibles with the teeth shorter, less acute ; lalMUin not conspicuous ; frons punctate and frequently 



with a series of large, thimble-like punctures ; wings often ornate, sometimes wanting or ab- 

 breviated 65 



Mandibles rather long, with acute teeth, the apical one usually larger and more acute than the other 

 two ; labrum consi)icuous ; frons very closely punctate or shagreened, the large punctures wanting ; 

 front wings not ornate, usually with a punctiform or very short marginal vein, the hind wings 

 usually with a long costal cell, which extends to the booklets ; head, as seen from in front, rather 

 narrow and long, subtriangular, the scrobes forming a triangle. 



Postmarginal vein wanting or hardly developed, the marginal vein very short, punctiform. 60 

 Postmarginal vein distinct, longer than the stigmal vein 64 



60. Head, viewed from in front, much longer than wide, the cheeks long 61 



Head, viewed from in front, not longer than wide, the cheeks not long 63 



61. Front wings with marginal cilia 62 



Front wings without marginal cilia. 



Antennffi very long and slender, the flagellar joints all very long, the sixth the shortest, but 

 five times as long as wide Psilophrys Mayr. 



62. Pedicel three or more times longer than thick at apex, the ilagellum with long hairs. 



Funicle joints about four times as long as thick, cylindrical ; mesonotum and scutellum 



shagreened Parapsilopbrys Howard. 



Funicle joints less than thrice as long as thick ; mesonotum reticulate Liotborax Mayr. 



Pedicel not three times as long as thick, the fiagellum clothed with long hairs. 



Copidosoma Ratzeburg. 



63. Cheeks about half the length of the eyes ; funicle joints 1-5 triangularly toothed, with long hairs. 



Prionomitus Mayr. 

 Cheeks very short ; eyes large, rounded, pubescent ; pedicel thrice as long as thick. 



Arcbinus Howard. 



64. Mesonotum lustrous, smooth, blue or metallic. 



Pedicel about thrice as long as thick, the fiagellum filiform or subfilifoim, with a .short, sparse 

 pubescence, the funicle joint from two and a half to three times as long as thick ; the first 

 joint very long, four or more times longer than thick ; eyes pubescent ; postmarginal vein 

 very long Parencyrtus Ashmead. 



65. Abdomen with the dorsum fiat or concave, not rigidly pubescent 66 



Abdomen subglobose or subovate, clothed with a rigid white pubescence. 



Pronotum large, conical ; antennae strongly compressed, broad ; wings wanting or poorly de- 

 oped, not extending to middle of abdomen Mira Schellenberg. 



Pronotum not large ; antennse simple, neither compressed nor broad. 



Head, .seen from in front, much longer than wide ; marginal vein not short : antenna; long, 

 the fiagellum subclavate, clothed with a soft, dense pubescence. Spbaeropisthus Thomson. 

 Head, seen from in front, not longer than wide ; marginal vein very short, the postmargi- 

 nal vein longer than the stigmal ; fiagellum filiform, the joints nearly thrice as long as thick. 



Chestomorpha Ashmead. 



66. Head not or less distinctly lenticular, opaciuc, minutely, closely ])unctafc, shagreened, or smooth and 



shining, at the most with only a few large punctures 70 



