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 tibiae and the 

 femora at their apex ferruginous, the extreme base of the ])0s- 

 terior tibia 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 tibia; obscurely ferru- 

 ginous. 



Hab. Brazil. (Coll. F. Smith.) 



Genus 7. STETHORECTUS. 



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

 Stethorectus, Smith, Ann. 8f Mag. Nat. Hist. xx. 394 (1847). 



1. Stethorectus ingens. B M. 



Stethorectus ingens, Smith, Ann. 4" Mag. Nat. Hist. xx. 394. 



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

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



Hab, Brazil (Para) ; British Guiana. 



2. Stethorectus nigripes. B.M. 

 Podium nigripes, Westw. Griff. An. Kingd. xv. 516. t. 7(i- f. 3. 

 Hab. Brazil. 



Genus 8. CHLORION. 



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



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



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



1. Chlorion lobatum. B.M. 



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

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



Dahlb. Hym. Europ. i. 24 .1. 



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



