44 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 80 



closely striate, the spiracles not beyond basal fourth of tergite ; second 

 tergite broader at apex than long, longitudinally striate, the lateral 

 depressed margins broad at base ; third tergite subequal with second, 

 finely aciculate at base ; rest smooth, ovipositor sheaths about as long 

 as the body. 



Testaceous; palpi brownish; antennae piceous, scape and pedicel 

 brownish yellow ; legs deep testaceous ; tai^i a little inf uscated ; wings 

 distinctly somewhat fuscous. 



Type.—U.S.^M. No. 43497. 



Type locality. — Germantown, Pa. 



Remarks. — Described from three females from the type locality 

 and one female from Maspeth, Long Island, N. Y. The type and 

 one paratype were collected September 25, 1904, the two remaining 

 paratypes on October 1, 1904, and September 27, 1924, respectively. 

 The only paratype with complete antennae has these 45-segmented, 

 like the type. 



31. MACROCENTRUS PALLISTERI De Gant 



Macrocentrus paedlscae Riley MS., Insect Life, vol. 3, p. 59, 1891. 

 Macrocentrus pallisteri De Gant, Proc. Ent. Soc. Washington, vol. 32, p. 65, 

 1930. 



Type. — In the United States National Museum. 



Closely related to cerasivoi'anae, and unusually pale specimens of 

 pallisteri are sometimes difficult to distinguish from that species; 

 however, the differences noted in the key will apparently separate 

 the two. It is possible that pallisteri is identical with pectoralis 

 Provancher, but I have not seen the type or authentically identified 

 specimens of the latter, and accordingly am recognizing pallisteri 

 as a valid name. 



In length, specimens of pallisteri range from 5 mm. to 9 mm. Head 

 but very slightly wider than thorax; face nearly twice as broad as 

 long; temples and cheeks rounded, not strongly receding; clypeus 

 large, long, subtruncate apically ; longest segment of maxillary pal- 

 pus not distinctly as long as second segment of antennal flagellum; 

 antennae usually from 44 to 50 segmented. 



Thorax stout; mesopleura anteriorly below, and prepectus, usually 

 closely punctate, sometimes confluently so ; mesosternal suture deeply 

 impressed posteriorly ; posterior coxae usually transversely aciculate 

 or lineolate apically; first cubital cell large, about as long as first 

 discoidal ; second abscissa of cubitus much more than half as long as 

 recurrent, often nearly as long; radius arising from beyond middle 

 of stigma ; submedian cell sparsely hairy, at least at apex ; nervulus 

 usually interstitial; hind wing with nervellus not inclivous, hardly 

 as long as lower abscissa of basella, which is much less than half as 



