HYMENOPTERA. 237 



posterior margin, and the mesothorax an abbreviated one at its 

 base ; the sides and the metathorax with a thinly scattered silvery- 

 white pubescence ; the anterior and intermediate tibia3 and the 

 femora at their apex ferruginous, the extreme base of the pos- 

 terior tibiae ferruginous ; wings hyaline, the superior pair have a 

 fuscous fascia occupying the second submarginal cell ; a fuscous 

 stain traverses the posterior margin of the externo-medial cell ; 

 the apex of the wings is faintly clouded. Abdomen smooth, 

 shining and impunctate. 



Male. — This sex is rather smaller, more slender and pubes- 

 cent ; the clypeus is only armed with two teeth, which are longer 

 than in the other sex and more acute ; the abdomen is covered 

 with a fine silky pilosity. 



Var. a. The anterior and intermediate tibiae obscurely ferru- 

 gmous. 



Hah. Brazil. (Coll. F. Smith.) 



Genus 7. STETHORECTUS. 



Podium, Westw. Griff. An. Kingd. xv. 516 (1832). 

 Stethorectus, Smith, Ann. ^ Mag. Nat. Hist. xx. 394 (1847). 



1. Stethorectus iNGENS. B M. 



Stethorectus ingens. Smith, Ann. Sf Mag. Nat. Hist. xx. 394. 



t. 23. f. 1?,2<?. 

 Podium giganteum, Erichs. Faun, et Fl. Brit. Guiana, iii. 589 ? 



Hah. Brazil (Para) ; British Guiana. 



2. Stethorectus nigripes. B.M. 

 Podium nigripes, Westw. Griff. An. Kingd. xv. 516. t. 1C^. f. 3. 

 Hah. Brazil. 



Genus 8. CHLORION. 



Sphex, pt., Fahr. Ent. Syst. ii. 206 (1/93). 



Chlorion, pt., Latr. Hist. Nat. des Crust, et Ins. iii. (1804). 



Pronaeus, Saund. Trans. Ent. Soc. iii. 58 (1841). 



1. Chlorion lobatum. B.M. 



Sphex lobata, Fahr. Ent. Syst. ii. 206. 30. 

 Chlorion lobatum, Latr. Gen. C ust. et Ins. iv. 57. 



Dahlh. Hym. Europ. i. 24 .1. 



St. Farg. Hym. iii. 330. 3. 



