312 ]\Ir. T. D. A. Cockeiell — Descriptions and 



clypeus yellow, slightly suffused witli reddish; triangular 

 supraclypeal mark and lateral marks pale yellow, the 

 latter elongate, pointed above on orbital margin above level 

 of antennae, but with the inner margin reddish and not 

 sharply defined ; scape pale reddish yellow, black above at 

 apex ; flagellum dark ; mesothorax nude, shining black, with 

 yellow lateral margins ; axillfe yellow ; hind margin of 

 scutellum yellowish white; tubercles cream-colour; tegulse 

 pellucid rufo-testaceous ; wings hyaline, faintly dusky, stigma 

 and nervures reddish ; legs ferruginous; hind tibise with apex 

 broadly, and hind margin except at base, black ; hind basi- 

 tarsus with a large black patch ; face and front with fine 

 short pale hair, not at all dense. 



Hah, Quirigua, Guatemala, = type locality, four workers 

 [W. P. Cockerell) ; Puerto Barrios, Guatemala, one, Jan. 28, 

 1912 {W. P. Cockerell). 



Looks exactly like T. jatij, Smith, but differs at once 

 by the abdomen, which is broad instead of almost linear. 

 Smith's description of T. jaty refers to the male, but I 

 have workers with the same narrow abdomen. The new 

 species also differs from jaty by the dark flagellum and other 

 small characters. 



Trigonajaty, Smith. 



Amatitlan, Guatemala, Feb. 1912 (W. P. Cockerell) ; 

 Quirigua, Guatemala, two on " common yellow Compositae/' 

 one at flowers of Zexmenia virgulta, Klatt, one Feb. 11, on 

 plant no. 15 [W. P. Cockerell). 



Trigona mellaria, Smith. 



Gualan, Guatemala, one Feb. 23, at flowers of Calopogonium 

 caruleum, Desv., Feb. 23 (JV. P. Cockerell) ; Quirigua, 

 Guatemala, one [W. P. Cockerell, 7). 



Trigona stigma, Smith. 



Quirigua, Guatemala, one {IV. P. Cockerell). New to 

 Central America. 



Trigona nigerrima, Cresson. 

 Quirigua, Guatemala, sixteen {W. P. Cockerell). Taken 



Is it possible that the " silvestriana"" reported by Vachal 

 from British Honduras was nigerrima? 



