2OO ENTOMOLOGICAL NEWS. [May, '15 



A new Genus and some new Species Belonging to 

 the Dipterous Family Bombyliidae. 



By E. T. CRESSON, JR., Academy of Natural Sciences of 



Philadelphia. 



This paper is the result of a brief study of the genus Geron 

 in the collection here. The genus seems to divide into two 

 groups which are quite distinct, holding characters, especially 

 one, which the writer considers of generic value. Typically 

 the species of Geron have the third joint of the antennae long 

 and tapering to a fine style-like apex. In 1892 Coquillett de- 

 scribed two species which he placed in this genus, which have 

 the third joint broadly rounded or truncated apically. Later 

 he described others with the same character. The style in 

 these, instead of being at the apex is in a shallow notch at or 

 near the upper angle of this joint. It is sometimes so minute 

 as to be scarcely discernible. This character, as well as the 

 absence of scales, and the slight difference in the venation, 

 serves as a base of the following new genus. All the previ- 

 ously known species of the group were described by Mr. 

 Coquillett, and are included in the table of species given in this 

 paper. 



Fig. 1. Antenna of Pseudogeron mitis (x 55). Fig. 2. Wing of Pseudogeron mitis 

 (x 14). Fig. 3. Antenna of Geron sp. (x 55). 



Through the kindness of Mr. Knab, of the United States 

 National Museum, the writer was able to examine the typical 

 specimens of most of the described species. 



With the aid of these I am able to construct a table of spe- 

 cies which I trust will be practical. On account of the lack of 

 good series of many of the species, the amount of variation is 

 difficult to determine and some of the characters used may not 



