BUFFALO SOCIETY OF NATURAI, SCIENCES 177 



Described from one male from Hood River, Ore. (J. M. 

 Aldrich ) . 



This species is distinguished by its small size, the large third 

 antennal joint, and the partly disengaged hypopygium. Type in 

 the J- ? f. Aldrich collection. 



This might be placed in Chrysotits but seems to fit into this 

 genus better, as the pulvilli of the fore tarsi are somewhat en- 

 larged, the form is rather slender, and the third antennal joint 

 is formed somewhat the same as that of several other species of 

 this genus. 



17 Diaphorus rauterbergi Wheeler. 



Diaphorus rauterbergi Wheeler, Psyche, June, 1890, p. 300. 



Male : Length 3 mm. Face with course yellow pollen ; 

 eves widely separated; antennae black, third joint large, kidney- 

 shaped ; arista apical. Thorax and abdomen metalic green with 

 course yellow pollen which is very thick on the thorax. Halters 

 and tegulae yellow, the latter with yellow cilia. Coxae black ; 

 femora green with broadly yellow tips ; tibiae and tarsi yellow, the 

 latter with enlarged pulvilli on all feet. Wings grayish hyaline. 



Saline Co., Nebr. 



18 Diaphorus albiciliatus n. sp. 



Male: Length 2.1 mm. Face narrower than the front, a 

 little narrowed in the middle, dark green with thin yellow pollen 

 which is more visible when viewed from the side ; palpi small 

 yellowish ; antennae black, third joint of moderate size, rounded 

 at tip, with rather long pubescens ; arista subapical ; front dark 

 green with scarcely a trace of yellow pollen. Thorax and scutel- 

 lum bright green with slight golden reflections and a central 

 coppery vitta, ( this vitta may not be found in all specimens, 

 although sharply defined in the type) ; thorax with very thin 

 gray pollen ; pleurae and coxae blackish with gray pollen and 

 green reflections ; there is a small white bristle above the fore 

 coxae. Abdomen darker green than the thorax, somewhat 

 coppen r towards the tip ; hypopygium small with concealed ap- 

 pendages ; bristles at the tip of the abdomen very small. Fore 

 coxae green with white hairs on the front surface and with the 

 extreme tips and the trochanters yellow ; femora green ; tips 



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