276 E. T. CRESSON, JR. 



Described from Europe. Before me are the following, 

 upon which I have based the above description : Auburndale, 

 Mass., 1 cf ; Mt. Greylock, Mass., 3 d 1 ; Mt. Equinox, Vt., 

 2 9. All collected by C. W. Johnson (B. S. N. H.) during 

 May (Auburndale) and June. These are probably sexes of 

 the same species. I cannot separate them irom pilosa Zett., 

 according to Verrall's description (1901 Verrall 71). The 

 only differences seem to be in the less conspicuous femoral 

 warts, the less grayish abdomen, and the darker legs of the 

 males, while the females are practically identical. This form 

 seems to be intermediate between this species and vilosa v. 

 Ros. according to the development of the femoral warts. 

 Williston's western species, opaca, differs in the venation as 

 well as possessing black, instead of yellow bristles, his de- 

 scription being based upon a female. Of course there is a 

 possibility of the above specimens belonging to a distinct 

 species, but only comparison with the European pilosa will 

 determine that question. 



NEPHROCERUS Zetterstedt. 

 The species of this genus are in size the largest of the 

 family. They may be readily distinguished by the reniform 

 third antennal joint, the well developed bristles on the mono- 

 sotal margin, and the inflated humeri and scutellum ; the 

 latter also having well developed bristles. In general ap- 

 pearance they are similar to those of the genus Pipunculus, 

 differing in the above mentioned characters. Only one spe- 

 cies is known here, N. daecki Johnson, described from Long 

 Island ; but there is another species reported from the White 

 Mountains, New Hampshire (1897 Slosson 239). 



PIPUNCULUS Latrielle. 

 In number of species this genus is the largest in the 

 family. Distinguished by the generally acute third antennal 

 joint, the apex of which is often drawn out into a long spini- 

 form beak, and tho sometimes nearly round apically, there is 

 always an indication of an angle ; the occiput is puffed put 

 and generally widely visible at the margin, but centrally 

 concave and more or less closely applied to the thorax ; all 



