258 HYMENOPTEEA. 



and third cubital cellules are subequal, both being narrowed towards the top ; the third 

 transverse cubital cellule is curved ; the first recurrent nervure is received in the apical 

 third of the cellule, the second close to the base of the cellule. 



We have also received specimens of a form with the four front femora broadly in 

 front, and the tibiae and tarsi entirely, yellow, the hind tibiae yellow in front, for the 

 greater part black behind, and the hind tarsi entirely yellow. The tegulae may be 

 fuscous or yellow, and the scape of the antennae is sometimes yellow beneath. 



This insect is common, and it, no doubt, is the male of one of the species I have 

 described, but I cannot say which. 



ii. Body entirely black. (Species 15.) 



15. Myzine melanocephala. 



Nigra ; alis hyalinis. $ . 

 Long. 10 millim. 



Hab. Mexico, Frontera in Tabasco (II. H. Smith). 



Head black, except three yellow marks on the clypeus and the base of the mandibles, 

 and two small marks over the antennae ; the clypeus covered with pale fulvous hair, 

 rugosely punctured ; the front and vertex clothed with long fuscous hair, rather strongly 

 punctured, the punctures distinctly separated ; the tips of the mandibles rufous. The 

 pro- and mesonotum shining, the former with some minute punctures ; the mesonotum 

 with the punctures larger and more widely separated, its centre raised and bordered by 

 a furrow, the raised part becoming narrowed towards the scutellum ; the middle of the 

 median segment coarsely, rugosely punctured, the apex semioblique, roughly irregularly 

 coriaceous in the centre, and with a blunt tooth at the sides, and another curving 

 upwards in the centre at the apex. The mesopleurae strongly punctured, the punctures 

 distinctly separated ; the metapleurae finely and closely punctured. Two small marks in 

 front of the pronotum and a line round its apex, a small incised mark near the centre 

 of the mesonotum, one on the postscutellum, and one under the tegulae, yellow. The 

 abdomen black, with a violaceous hue, with fine scattered punctures; the segments at 

 the apex narrowly lined with yellow. Wings hyaline ; the first cubital cellule a little 

 narrowed at the top — at the top equal in length to, at the bottom longer than, the third ; 

 the first and second transverse cubital nervures straight, oblique, the third curved ; the 

 first recurrent nervure is received beyond the middle, the second close to the base of 

 the cellule. 



/ iii. Abdomen ferruginous. (Species 16.) 



V 16. Myzine rufiventris. (Tab. XII. fig. 23.) 



Myzine rufiventris, Cresson, Trans. Am. Ent. Soc. iv. p. 201 \ 



Hab. Noeth America, Texas 1 . — Mexico, Chilpancingo in Guerrero 4600 feet 

 (II. H. Smith). 



