24 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 08 



frontals slightly yellow, a double pollinose spot between the vertical 

 bristles behind the ocellar. The front and lower part of the head 

 appears to be yellow in ground color, the parafacial is considerably 

 wider than the third antennal joint. First and second joints of 

 antennae and base of third yellowish, Sternople'ural two. First 

 principal segment of the abdomen entirely black, except the very 

 narrow hind edge above; second segment broadly yellow on each 

 side, its ventral part strongly projecting, with numerous very short 

 stubby spines on the swollen portion, which forms a flattened area 

 extending back upon the following segment; third and fourth seg- 

 ments reddish, nearly covered with a very thin whitish pruinosity. 

 The spines on the fourth segment become irregularly discal in the 

 middle; the fifth segment bent forward and under the abdomen, 

 long and conical, reddish-brown in color, covered with short, stiff, 

 retrorse hairs; the last genital segment small on the basal portion, 

 being mostly developed into a single, very large up-turned, curved 

 holding organ, which is on the right side of the apical opening and 

 has on its mesal side a very distinct groove for the reception of the 

 stinglike ovipositor. This apical opening occupies a sloping posi- 

 tion upon the base of the prolongation or hook, and I can see no 

 indication of a broken off left hook, such as would occur in nana. 

 It is possible, however, that such a hook may have been present 

 when the specimen emerged. Front tarsi normal; claws and 

 pulvilli small. Wings more yellow than brown except around the 

 first posterior cell, from the costa to the hind crossvein. 



Length, 10.6 mm. 



Described from a single female specimen taken at Gualan, Guata- 

 mala, by W. P. Cockerell (Mrs. T. D. A. Cockerell). 



ry/?e.— Female, Cat. No. i9960, U.S.N.M. 



The species nana connects this form with the ordinary typical 

 members of the genus Cylindroniyia- so well that at least until the 

 male is loiown I think it not expedient to recognize the genus 

 Apinocyptera. 



CYLINDROMYIA UNIFORMIS, new species 



(Fig. 4) 



This species is almost like euchenor, but is somewhat smaller and 

 differs quite decidedly in the shape of the fifth sternite, which cer- 

 tainly must be a specific character. In uniforniis the median exci- 

 sion of the fifth sternite is narrow, only a little rounded at its 

 base, and on each side of it there is a rather elongated, narrow 

 lobe bearing a few hairs. This lobe forms a rather acute angle with 

 the margin of the sternite laterally, and this margin bears at a little 

 distance three erect bristles of which the hindmost is the largest. 



