40 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



the basitarsus; second cubital cell rather small, obliquely triangular, 

 petiolated; radial cell very narrow; first abscissa of mediella always 

 distinctly longer than the second; nervellus strongly angled above 

 the middle and emitting a distinct discoidella from this angle; first 

 abdominal tergite usually more or less striate and provided with two 

 dorsal longitudinal keels which are usually short and sometimes 

 are very weak; remainder of the abdomen smooth and poHshed; 

 ovipositor sheaths nearly as long as the body. Head and thorax 

 black, with the propodeum and metapleura testaceous or ferruginous; 

 anterior and middle legs black or blackish; posterior coxae, trochan- 

 ters, and femora reddish testaceous, their tibiae blackish at apex and 

 their tarsi blackish; wings strongly infumated; abdomen red. 



The above notes are based on the following material: The type, 

 which is from Pennsylvania, specimens from New York, New Hamp- 

 shire, Maryland, Pennsylvania, Virginia, Massachusetts, District of 

 Columbia, Ohio, Illinois, Georgia, New Jersey, Iowa, and South 

 Dakota, in the United States National Museum, and considerable 

 material, all from Illinois, in the collection of the University of Illi- 

 nois. 



Hosts. — There is one specimen in the National Museum reared by 

 R. A. Cushman as a parasite of Lixus scrohicollis Boheman at 

 Vienna, Virginia; and another labeled "Reared from Mordelhd? 

 gallery in the stem of ragweed, Sioux City, Iowa, C. N. Ainshe." 

 Piobably this species will be found to attack various lepidopterous 

 and coleopterous larvae living in the stems of herbaceous plants. 



13. BASSUS ATRIPES (Cresson) 



Agathis atripes Cresson, Proc. Ent. Soc. Phila., vol. 4, 1865, p. 296. 



Type.—^o. 1731,Academy of Sciences, Philadelphia, Pennsylvania. 



Very similar to nigripes and sometimes difficult to distinguish 

 from that species. However, the antennae are decidedly longer, 

 being usually 34 to 36 segmented; the parapsidal furrows, although 

 weak, are nevertheless suggested and distinctly set off the middle 

 mesonotal lobe from the rest of the scutum; the ridge between the 

 antennae is apparently always more prominent in atripes and decends 

 rather abruptly behind; and aU the specimens I have seen have the 

 legs entirely black, without even reddish marks on the anterior femora 

 and tibiae. 



Face as long as broad, rostriform; malar space about as long as 

 the eyes; cheeks distinctly concave; third segment of labial palpi 

 not greatly shortened, more than half as long as the fourth; frontal 

 impressions immargined; vertex short; temples bulging somewhat; 

 head hollowed out behind; scutellum not margined at apex; propo- 

 deum mostly smooth and shining, with a long narrow median area 



