294 [September 



shining black, between them a tuft of yellowish pubescence ; antenuse 

 porrect. two-thirds the length of the body, somewhat thickened, basal 

 joint black, yellow beneath, the 8 following joints fulvous, paler beneath, 

 the 6 following joints yellow, the apical ones black above, fulvous be- 

 neath, the 2nd, ord and 4th basal joints are blackish above, the ord 

 joint nearly as long as the 4th and 5th together. Thorax finely punc- 

 tured, the dorsal lines deeply impressed ; collar above, a line or two 

 spots in front of the mesothorax, tegulae and a spot behind the posterior 

 wings, yellow; scutellum rather convex, polished, yellow, as well as a 

 line on the postscutellum ; metathorax densely punctured, black, with 

 a large subtrefoil, or sometimes an angular, yellow mark on its posterior 

 face, as well as a spot on each side of it, anteriorly there is a curved 

 well-defined carina extending from side to side. Wings subhyaline, 

 stained with fuscouss, and having a slight violaceous reflection at tips ; 

 nervures fuscous, pale at base, stigma brown ; areolet large, slightly 

 oblique, subquadrate or 5-angular, its lower nervure angular. Legs 

 polished, long and slender, especially the posterior pair ; the two ante- 

 rior pairs except their cox^b above, the basal two-thirds of the posterior 

 tibiae, sometimes a spot on their coxae behind at base, and their tarsi 

 entirely, yellow ; the apical half of the posterior trochanters and the 

 basal half of their femora, bright fulvous ; remainder black. Abdomen 

 elongate, fusiform, shining, black ; basal segment much longer than the 

 second, linear, not at all dilated, somewhat flattened above, scarcely 

 arcuated, polished and having on each side beyond the middle a promi- 

 nent tubercle, the apex slightly swollen and often with a yellowish spot 

 on each side, sometimes the lateral margins and under surface of this 

 segment including the petiole, are yellowish ; ovipositor nearly as long 

 as the abdomen, rufous or piceous, valves black. Length 6 — 7 lines; 

 expanse of wings 9 — 10 i lines. 



Variety 9 . — The flice black, the frontal orbits, two connected spots 

 beneath the antennae, a semicircular spot on the clypeus and the labrum, 

 yellow ; base of the scutellum black ; metathorax entirely black except 

 a subarcuated yellow line posteriorly ; abdomen entirely black except 

 the first segment beneat4i which is tinged with rufous; posterior coxa? 

 immaculate. Length 4j lines; expanse of wings 7 lines. 



3IaU. — ReseAbles the female, but much more slender, the antenn^xj 



