118 PROCEEDING^ OF THE NATIONAL MUSEUM. vol.55. 



Type-locality. — Williamsport, Maryland. 



Type.— Cat. No. 21617, U.S.N.M. 



Host. — /Stagniatophora gleditscMaeella Chambers. 



Three females and three males reared, according to Mr. W. R. 

 McConnell, of the Bureau of Entomology, from larvae of the above- 

 named host infesting the spines of honey locust {Gleditsia triacan- 

 thos). Also a number of specimens taken by Mr. P. E. Myers, of 

 the Bureau of Entomology, in the type-locality. 



Subfamily Braconinae. 



BASSUS IMMACULATUS, new species. 



Female. — Length 3.5 mm. Resembles (Microdus) Bassus discolor 

 Cresson as represented by a Viereck homotype in the United States 

 National Museum, but differs in lacking any black markings on the 

 head, thorax, and abdomen, in having the propodeum more evenly 

 and finely sculptured, the second and third tergites very weakly 

 sculptured, the areolet slightly larger, and the sternauli short, weak, 

 and not foveolate, instead of nearly complete and deeply foveolate. 



Head perfectly smooth and polished; distance between the eye 

 margins at antennae very slightly greater than from antennae to apex 

 of clypeus ; malar space somewhat less than half the long diameter of 

 the eye; postocellar line approximately two-thirds as long as the 

 ocellocular line ; a broad rounded ridge between the antennae ; occiput 

 very slightly concave; antennae 34-jointed in type, the first flagellar 

 joint the longest, nearly four times as long as thick, second and third 

 joints of flagellum subequal and a little less than three times as long 

 as thick, all flagellar joints longer than thick; thorax smooth, pol- 

 ished; parapsidal grooves deep, not crenulate; transverse furrow at 

 base of scutellum distinctly finely crenulate; propodeum entirely 

 without longitudinal or transverse carinae, finely granularly coria- 

 ceous; areolet triangular, subpetiolate ; first brachial cell broadly 

 open at apex behind; longer spur of the hind tibiae distinctly less 

 than half the length of basal joint of tarsi; tarsal claw with a distinct 

 basal tooth ; abdomen about as long as the head and thorax, the first 

 tergite granularly coriaceous like the propodeum, the second and 

 third tergites with faint traces of similar sculpture, following ter- 

 gites smooth ; ovipositor extending beyond the apex of abdomen about 

 three-fourths the length of the body. Antennae, eyes, ocelli, small 

 blotch at apex of posterior femora above, narrow basal band and 

 broad apex of posterior tibiae, posterior tarsi and the ovipositor 

 sheaths black or blackish ; scape beneath testaceous ; hind tibiae, ex- 

 cept as noted, whitish ; remainder of insect immaculate reddish testa- 

 ceous. Male unknown. 



Type-locality. — Baton Rouge, Louisiana. 



