SNOW: CNEI'HAI.IX AND ITS ALLIES. l8l 



antennal joint about five times as long as the second, the second 

 aristal joint longer than the third and strongly geniculate; and with 

 but two marginal raacrochtEtte on each of the first two segments of 

 the abdomen Moreover, several males from the Alagdalena Mts., 

 New Mexico, have strikingly elongate claws and pulvilli, but other- 

 wise agree with the types of Gonia sequax Will. Dr. Williston, in an 

 article on Belvosia* has shown in drawings of the front feet of nine 

 specimens a great variation in the length of the claws in both sexes. 

 Bflvosia is an allied form and the comparison is pertinent. It would 

 appear to me that the protuberant front is a more available character 

 for the genus Gonia. 



ONE3PHALIA. 



The relationship between Cneplialia Rond., Psi-uiiogo/iia B. B. and 

 Spallanzania in the sense of Rondani, and Brauer and Bergenstamm, 

 must be a very intimate one. By consulting the table of genera, it 

 will be seen that Cneplialia and Spallanzania differ from Pseudogonia 

 in having the arista straight, and a longer second aristal joint. Cne- 

 plialia differs from Spallanzania only in the third antennal joint being 

 shorter in proportion to the length of the second, and in a shorter 

 second aristal joint. The study of a large series of American 

 "Goniidse" convinces me that these characters, including the genic- 

 ulation of the arista, are entirely too variable and unreliable for the 

 differentiation of the genera of the group. This, I trust, will be ap- 

 parent in the descriptions further on. While I, unfortunately, have 

 not seen European specimens, my opinion, based upon the American 

 material and a study of the European literature, is that Pseudogonia 

 and Spallanzania must be included in Cneplialia. 



In the University collection there are specimens which I have 

 assigned to Cneplialia under three species. A study of these will 

 explain why I have rejected certain characters regarded as generic by 

 many writers, and which I believe are not even of specific value. 

 The three forms have in common the following characters: Robust 

 form and cinereous color; head broad, a little swollen in front, but 

 much less so than in all the species of Gonia which I have seen; front 

 and sides of the face wide, both of which are of nearly equal width 

 in the female, but the former narrowed above in the male. Ocellar 

 bristles reclinate; orbital bristles wanting in the male, but present in 

 the female; two rows of bristles on each side of the front; sides 

 of face beset with small bristles; first two joints of the antennce red- 

 dish, third joint black; arista three-jointed; proboscis long and 

 slender with small labellse; palpi cylindrical, slightly enlarged at the 

 tip, yellow. Thorax with four black stripes; scutellum testaceous. 



* Insect Life, v, p. 238. 



