NEW SPECIES OF CERATOPOGON. 13 



Each of the puparia had been killed by an interesting proto- 

 trypid parasite so that no imagines of this new myrmecophilous 

 Ceratopogon could be obtained. A number of these parasites 

 were sent to Mr. Ashmead for identification and proved to repre- 

 sent a new genus of the family Diapriidae. Through the kind- 

 ness of Mr. Ashmead, his description of this new genus and 

 species is inserted in this article. By way of illustration figures 

 are included of this new species (Adeliopria longii Ashmead) and 

 also of the new and closely related species (Solenopsia imitatrix] 

 recently described by Wasmann. 1 The Ceratopogon puparia 

 were found December i 5, 1900, beneath a stone, in what seemed 

 to be an abandoned ants' nest. The parasites issued, one from 

 the thoracic dorsum of each of the Ceratopogon puparia De- 

 cember 3 i and lived eight or ten days. This suggests that some 

 of the proctotrupids that have been found in ants' nests and 

 regarded as myrmecophiles may be in reality only parasites of 

 the guests of the ants. 



A comparison of the five species above described shows that 

 the larvae of each have practically the same general size, shape, 

 and color ; but the spinous ornamentation is very different, so 

 that they are readily separable by this means alone. In C. ste- 

 nammatis the larvae differ from the other species in the shape of 

 the anal feet which are cylindrical, short and armed with claws at 

 apex. 



The puparia of the Texan Ceratopogons also resemble one 

 another very much. Even the differences in spinous ornamenta- 

 tion are not so marked as in the larvae. The imagines, however, 

 differ in many essential details, especially in coloration and pilos- 

 ity. The palpi of both sexes of C. brumalis and C. spccnlaris 

 are similar, but the female of C. tcxanus has the second joint of 

 the palpus much enlarged and the sense organ on it correspond- 

 ingly increased in size (see Fig. 6, s and /) ; the neuration of the 

 wings of the species is practically identical ; the anal extremities 

 of all the puparia which were examined by the writer have the 

 peculiar furcate anal tip and " fingers " described under C. specu- 

 laris (see Fig. 6, r). These probably function, as suggested, in 

 holding the old larval skin to the posterior segments of the pupa. 



1 Die psychischen Fahigkeiten der Ameisen, 1899, p. 127 and taf. III., figure I. 



