308 HYMENOPTERA. 



51. TETRALONIA FLAVITARSIS. 



Tetralonia flavitarsis, Spin. Faun. Chili, vi. 174. 1. 



Length 4J lines. Black, the pubescence fulvous ; the tarsi 

 and tegulae subrufous ; the abdomen having three fasciae of white 

 pubescence ; the antennae of the male longer than the body. 

 Hab. Chili. 



52. TETRALONIA MEL^NA. 



Tetralonia melama, Spin. Faun. Chili, vi. 1/6. 4. 



Length 5 lines. The pubescence entirely black ; wings hya- 

 line, nervures black. 



Hab. Chili. 



53. TETRALONIA GAYI. 



Tetralonia Gayi, Spin. Faun. Chili, vi. 176. 3. 



Length 5 lines. The pubescence white ; the labrum, legs and 

 abdomen beneath black; the antenna? of the male shorter than 

 the body. 



Hab. Chili. 



54. TETRALONIA LANIERII. 



Macrocera Lanierii, Gaer. Icon. Reg. Anim. Ins. 455. t. 74. f. 7. 

 Hab. Cuba. 



55. TETRALONIA FULVIVENTRIS. B.M. 



Female. Length 7 lines. Head and thorax black, the face 

 has a thin pale fulvous pubescence, that on the disk of the thorax 

 is similar ; the labrum ciliated with bright fulvous hairs ; the 

 tegulse rufo-piceous, wings fulvo-hyaline, the nervures ferrugi- 

 nous, the apical margins of the wings faintly clouded ; the legs 

 nigro-piceous, the tarsi ferruginous ; the legs clothed with bright 

 fulvous pubescence. Abdomen, the base of the segments black, 

 the apical margins of the segments broadly rufo-testaceous, ex- 

 cept the basal half of the first segment, the whole densely clothed 

 with a short bright fulvous pubescence; beneath the margins 

 of the segments rufo-piceous, ciliated with ferruginous hairs. 



Hab. Mexico? 



56. TETRALONIA ATRIFRONS. 



Female. Length 7 lines. Black, the pubescence on the head 

 entirely black. The thorax above, and the basal segment of the 

 abdomen, clothed with ochraceous pubescence, on the other 



