30 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 69 



longest, the other two about one-half as long, the apical one thin- 

 nest. 



Thorax about twice as long as wide, only slightly convex above, 

 the width distinctly greater than the depth; pronotum conical and 

 visible in large part, its posterior margin arcuate; mesoscutum less 

 than twice as wide as long; axillae moderately long at their outer 

 ends, acutely meeting medially; scutellum somewhat shorter than 

 the scutum, longer than wide in the apterous form and acute at 

 apex, about as long as wide and more rounded at apex in the macrop- 

 terous phase, the disk depressed, the sides abruptly declivous but 

 not very strongly elevated; propodeum obliquely declivous toward 

 apex, rather short medially. 



Abdomen ovate, depressed, rather acute at apex, about as long as 

 the thorax; the tergites not greatly unequal in length, the seventii 

 longest medially, the third, fourth, and sixth shortest; cereal plates 

 situated at the middle of the lateral margins ; venter not compressed, 

 ovipositor not inclosed apically by the ventrites, the sheaths just 

 barely protruded. 



Legs of normal length and structure, the middle tarsi stouter than 

 the hind pair, tapering towards apex, the spur slightly shorter than 

 the first joint. Wings generally rudimentary and reaching about to 

 the apex of the propodeum, truncate at apex; when fully developed 

 they are moderately wide and surpass the apex of abdomen, marginal 

 fringe short ; discal setae rather dense and fine, quite as dense on the 

 hyaline median crossband but white and almost invisible when wing 

 is mounted in balsam, much sparser and also hyaline in the clear 

 area beneath the basal half of the venation ; costal cell narrow, and 

 with two or three rows of very fine, hyaline setae on the basal half ; 

 speculum distinct, strongly oblique, and widening below; submar- 

 ginal vein nearly straight, marginal about four times as long as wide, 

 the stigmal subequal to the marginal, only slightly widened toward 

 the apex, the postmarginal about one-half as long as the stigmal: 

 spur of the stigmal vein reaching about opposite to the middle of the 

 costal margin. 



Frontovertex finely punctulate, the punctures thimblelike, not 

 quite uniform in size, being distinctly finer around the ocelli and in- 

 terspersed with a few shallow pin punctures ; face rather more finely 

 reticulate; cheeks equally finely longitudinally reticulate-striolate ; 

 mesoscutum minutely scaly reticulate; scutellum densely longitudi- 

 nally shagreened with alternate fine striae and broken lines, the 

 axillae with a similar obliquely transverse sculpture ; pleura smooth- 

 ish, the propleura and prepectal plates finely reticulate, the meso- 

 pleura more finely and longitudinally reticulate ; propodeum smooth ; 

 abdomen uniformly reticulate, except that the first tergite is smooth 

 across the base, with the meshwork distinctly coarser than that of 

 the mesoscutum or face. 



