HYMEXOPTERA. 359 



ards the vertex ; antennae short, subfiliform, slightly thickened 

 in the middle, pointed at the apex ; the scape short, thick and 

 cylindrical ; the first joint of the flagellum short, about half the 

 length of the second, the rest of about equal length ; mandibles 

 arcuate, acute at their apex, not toothed within, with a dentate 

 process beneath towards the base ; the labrum concealed. Tho- 

 rax rotundate, the collar narrow, transverse ; the scutellum 

 transverse, oblong- quadrate ; the metathorax truncated, with a 

 mucro at the sides and about the middle of the truncation ; the 

 superior wings with one marginal and three submarginal cells ; 

 the marginal cell elongate, rounded at the apex, and slightly 

 appendiculated ; the first subraarginal cell elongate, twice the 

 length of the second and third united ; the second submarginal 

 cell petiolated ; the third oblique, of nearly equal width ; the 

 first recurrent nervure received by the first submarginal cell near 

 its apex ; the second recurrent nervure entering the second sub- 

 marginal cell near its apex ; the legs stout ; the anterior tarsi 

 cilated outside, the intermediate and posterior tibiae spinose ; 

 the claws simple, having a pulvillus in their fork. Abdomen 

 ovato-conic, truncated at the base, the apex acute. 



1. HELIORYCTES MELANOPYRUS. PI. IX. fig. 3. 



Female. Length 4 lines. Head and thorax black, opake, 

 finely and very closely punctured ; the palpi pale rufo-testaceous, 

 the mandibles ferruginous in the middle. Thorax : the meta- 

 thorax above enclosed by a half-circular ridge, the enclosed space 

 reticulated ; wings dark fuscous, nearly black ; the legs ferrugi- 

 nous, with the coxae, trochanters, and base of the anterior femora 

 behind, black ; the posterior tibiae incrassated towards their apex, 

 roughened outside, and furnished with three rows of short acute 

 spines; the intermediate tibiae not roughened, but similarly 

 armed to the posterior pair. Abdomen ferruginous, very closely 

 and finely punctured, the two apical segments very smooth ami 

 shining, with a few scattered fine punctures; the sides of the 

 apical segment carinated. 



Hab. The Gambia. (Coll. F. Smith.) 



Genus 8. GORYTES. 



Sphex, pt., Linn. Syst. Xat. i. 941 (1/66) 

 Vespa, pt., Linn. Syst. Xat. i. 948 (1766). 

 Crabro, pt., Rossi, Faun. Etrus. App. 123 (1/90). 

 Mellinus, pt., Fabr. Ent. Syst. ii. 285 (1793). 

 Gorytes, Lair. Hist. AV. xiii. 308 (1805). 

 Arpactus, Jurine, Hum. 194 (ISO/). 



R 5 



