ART. 16 WASPS OF THE SUBFAMILY BRACONINAE MUESEBECK 45 



all intergrades from entirely black to nearly entirely ferruginous oc- 

 cur; wings a little infumated; anterior and middle legs usually 

 mostly black, the femora and tibiae often somewhat marked with 

 reddish; posterior legs var^^ing from almost entirely black to mostly 

 ferruginous, most frequently being black, with the femora pale. 



The above discussion is based on National Museum material from 

 Canada, New York, Massachusetts, New Hampshire, Michigan, Wis- 

 consin, South Dakota, and the District of Columbia; and several 

 specimens in the collection of the Boston Society of Natural History, 

 from Massachusetts and New Hampshire. This material exhibits 

 unusual variability, both in color and sculpture, and I am not entirely 

 satisfied that only one species is concerned; but the presence of 

 practically all intergrades seems to indicate that this is the case. 



18. BASSUS CALCARATUS (Cresson) 



Microdiis calcaratus Cresson, Canad. Entom., vol. 5, 1873, p. 51. 



Type. — In the Philadelphia Academy of Sciences. 



A rather common species, which appears to be very constant in 

 color markings. Face broader than long; clypeus broad and only 

 slightly convex; third segment of labial palpi very short, usually in- 

 distinct; malar space short, rarely more than one-fourth the eye 

 height; temples rather narrow, gradually receding; frontal impres- 

 sions not deep, immargined; antennae 34 to 40 segmented; parapsidal 

 furrows sharply impressed, sometimes weakly foveolate anteriorly; 

 middle mesonotal lobe strongly elevated anteriorly; furrow in front of 

 scutellum smooth, not distinctly pitted; pleura polished; mesopleural 

 furrow short, rather weak, smooth; propodeum nearly always com- 

 pletely aerolated, the carinae prominent, the areas usually smooth 

 within; second cubital cell triangular, usually shortly petiolate, the 

 petiole nearly always distinctly shorter than the first abscissa of ra- 

 dius; first abscissa of mediella distinctly shorter than the second; 

 nervellus not angled; abdomen polished; the first tergite with two 

 prominent dorsal longitudinal keels; second and third tergites each 

 with a more or less distinct transverse impressed line which is often 

 weakly foveolate; suture between these two tergites also sometimes 

 foveolate in part; ovipositor sheaths nearly as long as the body. 

 Head black; thorax black, with propodeum and metapleura red; wings 

 rather strongly infumated, the hind wing with the area behind the 

 mediella more or less hyahne; anterior and middle legs black, their 

 tarsi sometimes pale; posterior coxae and femora red; posterior tro- 

 chanters, tibiae, and tarsi black; abdomen entirely red; length usually 

 4.5 to 6 mm. 



The following material has been examined in the course of this 

 study: The type, which is from Delaware; two specimens from 

 Edgartown, Massachusetts, in the collection of the Boston Society 



