no. 2173. A REVISION OF THE B EM B WINE WASPS— PARKER. 7 7 



other longer, curved, laterally compressed, strongly chitinized, 

 smooth, and variable in form at the apex. 



In the majority of the species the wings are hyaline, but in a few 

 species they are more or less strongly infumated, the infumation being 

 less evident in the wings of the male than in those of the female of 

 the same species. In the anterior wing the radial cell, pointed at the 

 proximal end and blunt at the distal end, lies on the costal border. 

 The first cubital cell is about as long as the second and third com- 

 bined. The second cubital cell is narrower on the radial vein than 

 on the cubitus and receives both discoidal cross veins. The first 

 cubital cross vein in nearly all species just before it joins the cubitus 

 bends strongly toward the proximal end of the wing. The third 

 cubital cross vein is roundly curved outward toward the distal end 

 of the wing and with the radial vein forms a right or obtuse angle 

 opening toward the distal border of the wing. The second sub- 

 medial cell is as long as the first, or a trifle longer, and gradually 

 increases in width toward the distal end of the cell. The basal vein 

 arises just proximal to the distal end of the first submedial cell. 



On the posterior wing the retinaculum, as in related genera, is 

 formed of an uninterrupted row of little hooklets beginning distal to 

 the origin of the radial vein, which is prolonged and reaches almost 

 to the distal border of the wing. The median cell is greatly elon- 

 gated and from its distal end two short veins, the ends of the radius 

 and cubitus, are extended, of which in some species one may be 

 obliterated. The cubitus arises distal to the end of the submedian 

 cell, which is long, and its posterior distal angle, formed by the sub- 

 median and submedian cross veins, is an acute or a right angle. 

 The submedian vein terminates in the anal sinus. The basal lobe is 

 oblong or oval and is approximately equal to one-half the length of 

 the submedian cell. 



The legs are well developed. The middle coxae are separated, the 

 trochanters are comparatively small, and the tibiae and tarsi are 

 strongly bespined. The middle tibia ends in a single spur. The 

 anterior tarsi are provided with tarsal combs on the outer (posterior) 

 side; these are strongly developed on the female, much less so on 

 the male. The claws are always simple, never toothed, and the 

 pul villi are always developed. 



The males of the different species show a variety of secondary 

 sexual characters, appearing on the antennae, legs, and sternites. 

 Various segments of the antennae are pitted, dilated, curved, or 

 spinose; the middle femora are sometimes serrate or dentate; the 

 middle metatarsus may be curved and the second or sixth sternite 

 (or both) may bear a process or a carina of some kind. All these 

 characters are available for the determination of species. 



