170 DIPTEROUS GENUS DIAPHORUS 



and several smaller ones. Tegulae and halters pale yellow, the 

 cilia of the former yellow but appearing blackish in certain 

 lights. Wings grayish hyaline, veins brown, yellow at the root 

 of the wing ; first vein reaching only about one-third of the dis- 

 tance to the tip of the second vein. 



Described from two females from Vera Cruz and Cordoba, 

 Mex. (Crawford), in the J. M. Aldrich collection and presented 

 to him by Prof. Charles Fuller Baker. Type in the collection 

 of J. M. Aldrich. 



Easily distinguished by the yellow band at the base of the 

 second segment of the abdomen, and the first antennal joint 

 and the legs being yellow. 



5 Diaphorus satrapa Wheeler. 



Diaphorus satra pa. Wheeler , Psyche, June, 1890, p. 359. 



Male : Length 2 mm. Antennae yellowish brown with the 

 third joint pointed ; front bronze black with violet reflections. 

 Dorsum of the thorax blackish bronze with a shining violet patch 

 bordered on each side by a broad, poorly defined, cupreous band. 

 Abdomen with the first segment bronze-green, second and third 

 mostly yellow, posterior segments blackish-bronze. Coxae and 

 feet pale yellow ; apical half of hind femora brown on the upper 

 surface; tibiae brownish. Halters and tegulae yellowish, cilia 

 of the latter white. 



Saline Co., Nebr. 



6 Diaphorus ventralis n. sp. 



Male : Length 3.5 mm. Face a little longer than wide, 

 covered with white pollen ; palpi small, whitish ; front narrow, 

 not much more than half the width of the face, green, in cer- 

 tain lights completely covered with gray pollen ; antennae small, 

 black, third joint very small, rounded ; arista dorsal ; orbital cilia 

 white except above. Dorsum of the thorax light green with 

 considerable yellowish pollen,, which is thickest on the front and 

 sides ; pleurae with gray pollen. Abdomen coppery or bronze 

 colored, more green at tip ; venter and more or less of the sides 

 of the second and third segments yellow ; venter with a few 

 long hairs on the hind margins of the segments ; bristles at the 

 tip of the abdomen of moderate size ; bypopygium small, without 



