484 Pomona College Journal of Entomology 



Carsidara Walker 



Head moderately small; vertex usually sulcatel}' impressed, scarcely plane, 

 strongly birostrate anteriorly; anterior ocellus usually above, upon vertex; pos- 

 terior ocelli anterior. Antennsp large basally ; flagellum very long and slender. 

 Labrum small, posterior; rostrum very long, slender and acute. 



Thorax usually quite narrow. Post-tibial spur large, prominent. Wing shin- 

 ing, hyaline, quite acutely angulate at apex; vein furcation scarcely dichotomous, 

 lateral. 



Type of genus: Carsidara marginalis Walker. 



Carsidara concolor n. sp. 

 (Figure 157, A; 158, C; 159, A; l6o, D) 



Length of body 2. 1 mm.; length of forewing 2.9 mm.; greatest width 1.0 mm.; 

 width of vertex between eyes .40 mm. ; with eyes .78 mm. General color light 

 green, somewhat flocculent. 



Head not deflexed, with eyes about as broad as thorax, finely punctate; dorso- 

 ventral width of profile greater than length through central axis of eye. Occipital 

 margin arcuate ; discal areas on each side of median suture with a long, oblique, 

 sulcate impression between posterior and anterior ocelli, and a smaller impression 

 near anterior ocellus ; posterior ocellar regions not greatly elevated ; vertex very 

 deeply emarginate and excised at median suture anteriorly, strongly birostrate. 

 Anterior ocellus near apex of excision, but not on it, quite large, distinct. Antennse 

 attached to rostrate lobes of vertex; basal segments very large; flagellum extremely 

 long and slender, filiform; third segment much longer than fourth. Facial 

 cones wanting; antennal bases scarcely swollen. Genw prominent. Labrum 

 small, posterior; rostrum very long and slender. Eyes large, quite strongly bulg- 

 ing. 



Thorax rather narrow, finely punctate. Pronotum rather long relatively; pro- 

 pleurites very long and prominent ; jileural suture curved, attaining almost to lower 

 margin of dorsulum ; forecoxae large, mostly visible. Dorsulum quite sliort, narrow. 

 Metasternal spurs moderately long. Post-tibial spur prominent, quite large. 

 Wings relatively quite large, hyaline, transparent, about two and three-fourths 

 times as long as broad, broadest across first marginal cell, quite acute at apex; first 

 marginal cell much smaller than second; fourth fureal rounded, terminating be- 

 low apex of wing; radius long; pterostigmal space open, quite long and broad; 

 cubital petiole shorter than discoidal subcosta ; basal subeosta shorter than discoidal 

 subcosta ; with a distinct plica connecting base of fourth fureal to radius. 



Male — Abdomen moderately long. Genital segment relatively large; claspers 

 long, curved, obtuse at apex; auxiliary claspers shorter, erect, very acute at tip; 

 anal valve very large, as long vertically as genital plate, with a short, broad pos- 

 terior lobe; pubescence rather short and flocculent. 



Female — Genital segment almost as long as rest of abdomen, slender, acute 

 at ajiex ; dorsal ])late with a strong convexity dorsad on basal two-thirds, and 

 a tuft of long slender hairs at caudal end of convexity; both plates of almost 

 equal length. 



