DESCRIPTION OF THE SPECIES. 283 



narrower oral opening ; the shape of the body, the striking 

 breadth of the forehead, the distribution of the bristles upon 4& 

 and upon the thoracic dorsum and scutellum, the shape of the 

 ovipositor, the outline of the wings, and the pattern of the picture 

 are remarkably analogous in both species, so as to preclude a 

 generic separation. 



34. T. latifrons Lw. 9. (Tab. X, f. 22.) Obscura, capite, tibiis 

 tarsisque lutescentibus, fronte latissima, scutello convexo, setis duabus 

 instructo, alae latiusculse, colore fusco-nigro pictse, iu disco parcius et 

 subsequaliter reticulata;, in dimidii apicalis margiue radiatae. 



Coloring dark ; head, tibiae, and tarsi clay-yellowish, front unusually 

 large ; the convex scutellum with two bristles only ; wings rather 

 broad, with a brownish-black picture, upon their middle somewhat 

 sparsely and not very evenly marked with hyaline drops, their apical 

 border radiate. Long. corp. J cnm terebra 0.30 ; long. al. 0.27. 



SYN. Trypeta latifrons LOEW, Monographs, etc., I, p. 89, 22. Tab. II, f. 22. 



Hab. Carolina (Zimmerman) ; Connecticut (Norton). 



Observation. A female from Connecticut, communicated to 

 me by Baron Osten-Sacken, is not much better preserved than the 

 female from South Carolina, from which my description in the 

 Monogr. Vol. I was drawn, and for this reason I am not able to 

 give a better one here. Of the two pairs of bristles upon the 

 thoracic dorsum the anterior one has dropped off ; it seems to have 

 been inserted rather far behind the transverse suture. The 

 structure of thorax and abdomen, the broad front, the bi- 

 setose scutellum, and the conical, not at all flattened, ovipositor, 

 indicate a relationship between this species and the two preceding 

 ones, from which, however, it differs in the shape of the wings 

 and the pattern of the picture. In the latter two points it 

 reminds one of Trypeta platyptera Lw., which differs again in the 

 more narrow front, a four-bristled scutellum, and a flattened ovi- 

 positor. Such being the case, we will be better justified in 

 connecting this species with T. solidaginis and comma, than with 

 T. platyptera and its congeners. 



35. T. melanura n. sp. J. (Tab. XI, f. 6.) Lutea, metanoto, 

 abdominis maculis in series quatuor dispositis et terebra brevi, atris ; 

 caput laetius luteum, fronte latissima, facie modice recedente, antennis 

 longis et acutis ; femora anteriora macula minuta nigra notatse ; alarum 

 pictura fusca, guttis majusculis hyalinis reticulata, quarum in celluli 

 posteriore secuuda tres, in tertia quatuor couglobatae. 



