OF WASHINGTON. 47 



slender body ; but distinguished by its pale antennae and the 

 male ventral characters. In P. marginata male the fourth ven 

 tral segment has a simple line of bristles. 

 Pepsis sommeri Dahlb. 



Violet-blue, antennae black; abdomen verging to green in the male. 

 Wings red with duskv margin, the apex subhvaline; base of wings, more 

 broadly in the male, black. First abdominal segment, especially in the 

 female, short and broad ; groove on second ventral segment deep in the 

 female, moderate in the male. 



Male. Fourth ventral segment simple, without bristles; fifth, not 

 hairy, margin scarcely sinuate; sixth, like preceding species ; seventh, fill 

 ing sinus, polished, a minute sinus in middle; eighth, with a transverse 

 median ridge beyond centre, the sides of the ridge connecting with oblique 

 carinae extending forward to the sides of the segement at the base; apex 

 thinner, polished, bent downwards at a right angle and its tip forming two 

 rounded lobes separated by an equal sinus. 



Claspers : sagittae flat, much curved, apices pointed below and contigu 

 ous, a minute tooth near base within, sagittae equal in length with the two 

 flattened, parallel median pieces, the median pieces curved dorsad and 

 pointing downward at apex; outer pieces little longer, flat; hairy apex 

 little thickened and subobtusely pointed. 



Size of P. cczrulea. Habitat. Poway, Calif. (F. E. Blaisdell). 



Differs from P. ccerulea in fuscous wing margin and in eighth 

 segment. Body is less slender than in P. marginata. 



In discussing this communication Mr. Ashmead said that he 

 had identified Pepsis marginatus, one of the species referred to 

 by Mr. Patton, in a collection made by Mr. Cordley in New 

 Mexico. He had previously received it also from the same 

 locality. 



Mr. Ashmead read the following paper: 



SYNOPSIS OF THE NORTH AMERICAN SPECIES OF TOX- 

 ONEURA SAY. 



By WM. H. ASHMEAD. 



The Braconid genus Toxoneura was described fifty-eight 

 years ago by Thomas Say, in the first volume of the Boston 

 Journal of Natural History, 1835, page 258. 



Although quite a characteristic genus, it yet remained for years 

 unknown to our entomologists. 



In 1865 Mr. E T. Cresson, in his paper entitled "On the 

 Hymenoptera of Colorado Territory," redescribed it under the 

 name of Tenthredoides with one species T. seminiger. 



