308 hymenoptera. 



51. Tetralonia flavitarsis. 



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



Length 4h 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. Chih. 



52. Tetralonia mel^ena. 



Tetralonia melaina, Spin. Faun. Chili, vi. 176. 4. 



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

 line, nervures black. 



Hab. ChiU. 



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 antennae of the male shorter than 

 the body. 



Hab. Chili. 



54. Tetralonia Lanierii. 



Macrocera Lanierii, Giier. 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 

 tegulaj 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 cf 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 ochracecus pubescence, on the other 



