22 PROCEEDINGS OF THE NATION" AL MUSEUM vol.78 



STYLOGASTER SPECIOSA, new species 



Female. — Frontal triangle large, shining black, almost reaching lu- 

 nule, slightly blunt at tip, often with a distinct light streak in front 

 of the anterior ocellus ; remainder of front velvet black to the lunule 

 except a rather wide silvery orbital stripe which extends from the 

 face and disappears before the vertex. First and second antennal 

 joints yellow, the latter slightly brown above; third joint reddish 

 with the upper edge blackened to the arista, which is almost at the 

 apex ; third joint about one and four-tenths times the second. Meso- 

 notum mostly 'shining black ; the humerus white, but the black color 

 approaches close to it behind and on the mesial side ; the usual dark 

 stripe on the mesopleura disappearing at the beginning of the sterno- 

 plura. Hind edge of the thorax dark brown. Scutellum blackish. 

 Metanotum distinctly black on its middle portion. Humeral 1; 

 notopleural 2; supraalar 2. 



Abdomen largely black, the sides of segments 2 to 5 yellow except 

 posteriorly, the color forming an interrupted crossband, more widely 

 interrupted on the fifth, less so on the fourth; first segment with 

 only white bristles on the sides, but in most of the specimens they 

 arise from a spot which is distinctly darker making a somewhat 

 unusual combination; second segment with a row of large lateral 

 black bristles also on a dark sjjot, the lower one or two bristles may be 

 pale. Ovipo'sitor somewhat longer than the remainder of the abdo- 

 men, the basal short segment yellow, principal segment black except 

 extreme base. Last joint snow white for half its length, gradually 

 darkening so that the apical third is shining black ; appendages also 

 black and with black hair. 



Front and middle legs pale yellow, tarsi darker beyond the first 

 joint. Hind femora pale yellow with comparatively narrow black- 

 ish annuli. Hind tibia black for a little more than half its length, 

 then pure white with white hair, the apical sixth black together with 

 the hind tarsi. 



Wing slightly browni'sh, first posterior cell not wider than sub- 

 marginal. Tip of second vein farther from base than anterior end 

 of small crossvein. 



Length, 6 mm. to ovipositor, the latter 4.2 mm. 



Described from seven females, collected on Barro Colorado Island, 

 Canal Zone (five by C. H. Curran and two by Nathan Banks). 



Type in American Museum of Natural History. 



Paratype.—FQm&lQ, Cat. No. 43030, U.S.N.M. 



STYLOGASTER PECTINATA, new species 



Male. — Front rather narrow, uniform brown to the lunule, hardly 

 darker above, the shining brownish triangle reaching middle. 



