254 8. W. WILLISTON, M. D. 



oral margin, the cheeks, and the posterior oi-bits green. First joint of autennie 

 three or four times as long as the short second joint, cylindrical, red, with black 

 hair; third joint black, long, slender, sulcate, the terminal [fifth?] not dift'eren- 

 tiated. Mesonotum black, with yellow pile, the post-alar callosities and broad 

 margin of scutellum yellow [or green]. Pleurte with a large, arcuated, yellow 

 spot in front, and several confluent ones behind below. Spines of scutellum 

 small, approximate. Abdomen flattened, opaque black; the second and third 

 segments each with a yellow spot on each side behind, not reaching the third of 

 the way across; narrow margin of the shining fifth segment yellow. Legs 

 brownish black. Wings uniformly and lightly tinged with brownish ; veins 

 approximate anteriorly, the minuti anterior branch of third vein present. 



One specimen, Chapada. Another, male specimen with this, pos- 

 sibly of the same species, has the facial convexity a little less strong, 

 red or green on the under part ; two slender vittulse on the mesono- 

 tum and the lateral margin of the same, yellow or green. The pleurae 

 are almost wholly light green, the pectus black. The abdomen has 

 the first pair of spots much larger and convex anteriorly, the second 

 pair obscure, the abdomen more reddish behind. The legs are 

 brownish red, not brownish black. 



25. IVIelanocliroa dtibia Boeder, Entom. Nachr. xii, 140. — Brazil. 



A .single specimen from Rio de Janeiro agrees well with Boeder's 

 description, except that the distal half or two-fifths of the middle 

 tibiae are yellow. The legs are marked precisely as they are in 

 Myxosargiis fasciatvs Brauer (or a species that I identify as such from 

 North Carolina), that is, deep black, except the distal half of the 

 middle tibiae and the first two joints of all the tarsi. The non-con- 

 tiguity of the male eyes and the aristiform termination of the an- 

 tennae are the only generic differences between these two species, 

 which otherwise resemble each other very much. The prolongation 

 of the face downwards in Myxosargiis is hardly of generic value, as 

 precisely the same difference occurs between the two related species 

 of Euryneura described above. 



26. Myxosargus Braiieri n. sp. 



9 ■ — Length 6 mm. Quite like M. fasciatus Brauer, except that the front has 

 a single, median, rather strong tubercle, the distal margin of the scutellum is 

 yellowish white and the legs are much more yellow, as follows: femora, except 

 the tip, black ; tibije, except a median brown or brownish ring, yellow ; tarsi 

 yellow, with the distal two or three joints brownish. 



This species is a very interesting addition. The structure through- 

 out, except, perhaps, the posterior orbits, as well as the coloration of 

 head, thorax, abdomen and wings, agrees fully with a male of M. 

 fasciahis Brauer, from North Carolina. Brauer describes the poste- 



