128 CHAS. T BRUES. 



however, and the antennae often resemble greatly those of the host 

 ant ; as is seen in this case to a remarkable degree. For this reason 

 the form of the antennae may not be so valuable for classification as 

 other characters. 



The general habitus of this form is like that of Solenopsia imita- 

 trix Wasmann, a peculiar proctotrupid which occurs in the nests of 

 Solenopsis fugax in Europe, and it is interesting to note the occur- 

 rence of this somewhat similar form with our North American Sole- 

 nopsis molesta, which resembles S. fugax in habits. It is apparently 

 the first myrmecophile which has been found living with this species 

 of Solenopsis, which is itself a facultative myrmecophile of other 

 species of ants. 



