Dec, 1914-] Mallock: North American Bezzia. 281 



Plate XL 



Fig. I. Ennya bicristata Stal, lateral outline. 



Fig. 2. Same, frontal outline. 



Fig. 3. Heranice miltoglypta Fairm., lateral outline. 



Fig. 4. Same, frontal outline. 



Fig. 5. Thrasymedes pallescens Stal, lateral outline. 



Fig. 6. Same, frontal outline. 



Fig. 7. Mafiirna Uoydi sp. nov., lateral outline. 



Fig. 8. Same, frontal outline. 



SYNOPSIS OF NORTH AMERICAN SPECIES OF THE 

 GENUS BEZZIA (CHIRONOMID^). 



By J. R. Malloch, 

 Urban.\, Illinois. 



Owing to the fact that descriptions of species in all genera of 

 the Ceratopogoninae have been published at various times in different 

 journals, and that heretofore no one has attempted to bring them 

 together in the form of synoptic tables, it is an extremely difficult and 

 tedious task to identify specimens belonging to this subfamily. Fol- 

 lowing my invariable custom when working over material belonging 

 to other families, I have drawn up a synoptic table for the species of 

 Bezzia, and hope that in presenting this for publication I may be able 

 to materially assist students of Chironomid?e in identifying their 

 species. I have already in print synopses of several genera, and in 

 this paper present one which includes all the species known to me 

 from North America which belong to the genus Bezzia. 



The members of this genus may be separated from all others in 

 Ceratopogoninae by the absence of the second vein, or, in other words, 

 of the cross vein connecting the first and third veins; by the absence 

 of surface hairs from the wings; the absence of empodia; and by 

 the presence of thornlike bristles on the ventral surface of at least 

 one pair of the femora. Probczzia differs from Bezzia only in having 

 the femora without thorns. 



None of the species of Bezzia are common with the possible ex- 

 ception of setulosa Loew, which is the only one known in the early 



