AMERICAN HYMENOPTERA. 59 



3. T. (Hylotoma) surinamensis, King, Berl. Mag. vi, 307, 38. B. b. ; Jalirbucli., 



249, 90.— Surinam. 



E. Wings icith one marr/inal cell appendiciilate. 

 Three submarginal cells. 



20. HYLOTOMA, »**«* Khig. 

 Hylotoma, ««•:-*«■ King, Jahrbuch., 1834, 248, 88. 



Wings, one marginal, appendiciilate and three submarginal cells, of 

 which the first receives two recurrent nervures. 



Tibise, all simple. 

 1. (Hylotoma) formosa, King, Jahrbuch., 1834, 248, 88, 9 .—Brazil. 



21. HYLOTOMA. King. 



Hylotoma, «-»«-«-«*, Klug, Jalirbuch., 1S3-1. 248. 



^y!n(Js, one niargiual, appeiidiculate and three submarginal cells, of 

 which the second i-eceives two recurrent nervures. 



Tibise all simple. 



1. (Hylotoma) leucocephala, King, Jahrbuch., 1834. 248, 89, 9.— Cayenne. 



22. DIDYMIA, Lepel. et Serv. 

 Hi/loto7na, fff, Lepel., Monogr. 1823, 48. 



Hylotoma, a-'S-s-;;:-^ Klug, Jahrbuch., 245. 



Dklymia, Lepel. et Serv. Encyc. Meth. 1827, x. ; Brulle, Hym. iv, 668. 



Gymvia, Lepel. MS. 



Wings, one marginal, slenderly appendiculate and three submarginal 

 cells, of which the first and second each receive a recurrent nervure ; 

 lanceolate cell contracted. 



Antennse 3-articulate; furcate in the males above the second article. 



Tibix all simple. 



Remainder as in Hylotoma. 



1. D. concinna. 



Hylotoma concinna, Klug, Jahrbuch., 1834, 246, 82, %. PI. II, fig. 8. 

 "Antennte longer than the abdomen, furcate, ciliate, pale; with the apex of 

 abdomen and the hinder tarsi black; wings fuscous in the middle, fuscous hy- 

 aline." 



" Somewhat larger than //. plnmigeva ; pale yellow ; head between 

 antennae shining brown; antennas dark at tip; anterior legs wholly 

 yellow; hinder legs yellow, M'ith the tibijic!, spines and tarsi blackish ; 

 wings in the middle pale yellow, transparent; at base and tip blackish ; 

 nerves and stigma yellow. 



Mexico. One male." 



Not seen. In the colored plate this is figured with the head and 

 apex of abdomen black, and the apical half of marginal cell and basal 

 half of both pair of wings very dark. 



