396 HYMENOPTEEA. 



Thorax rugose throughout, the metathorax much more strongly so ; the latter gradually 

 sloping to the apex, and without tubercles. Abdomen opaque, finely and closely 

 rugose ; the base with some stout striations ; with two white spots placed laterally and 

 at a little distance from the base. Legs stout, sparsely whitish-pilose ; the trochanters, 

 the fore coxae, the apices of the middle coxae, and a ring near the base of the hind tibiae, 

 white ; the front femora, tibiae, and tarsi, and the middle knees, whitish-testaceous, this 

 colour running into red on the femora and tibiae. The fore wings are hyaline behind 

 the stigma, smoky in front of it. 



In some specimens the white marks on the abdomen extend nearly to the middle of 

 the segment, and the metanotum runs into reticulations ; in others the punctuation is 

 stronger. A specimen from Bugaba has the hinder tibiae entirely black. 



Easily known from the other Central-American species by the strongly rugose thorax. 



ASCOGASTER. 



Ascogaster, Wesmael, Nouv. Mdm. Acad. Brux. 1835, p. 226. 



This genus (or section) diiFers from Chelonus in having the eyes bare, and in the first 

 discoidal cellule being separated from the first cubital cellule. 



1. Ascogaster bugabensis. 



Niger, scapo antennarum fusco, pedibus rufo-testaceis, dimidio apicali tibiarum posticarum tarsisque posticis 



nigris ; alis hyalinis, basi fere fumatis. $ . 

 Long, fere 4 millim. 



II ah. Panama, Bugaba (Champion). 



Antennae a little shorter than the body, 16-jointed, microscopically pilose ; the third 

 and fourth joints subequal, the fourth longer than the preceding two united, conical ; 

 the scape reddish-testaceous beneath. Face shining in the centre, the sides more opaque, 

 minutely punctured ; vertex shining, minutely punctured ; mandibles obscure testaceous. 

 Thorax shining, the sides bearing rather long white hair ; the mesopleurae minutely 

 punctured along the edges ; scutellum rugose ; metathorax semiopaque, punctured, 

 strongly so at the apex, the apex with an oblique slope, margined above, and without 

 distinct tubercles. Abdomen strongly longitudinally striolated, and with three stout 

 keels at the base ; the apex shining, smooth. Wings hyaline, scarcely infuscated 

 towards the apex, the nervures dark fuscous, pale at the base ; the transverse basal 

 nervure curved ; the radial nervure angled where it receives the transverse cubital 

 nervure, these nervures being perfectly straight. Legs stout ; red, except the apical 

 three fourths of the hind tibiae and the hind tarsi. 



