BUFFALO SOCIETY OF NATURAE SCIENCES 175 



13 Diaphorus caerulescens Loew. 



Diaphorus caerulescens Loew, Wien. Ent. Monatsch., i, p. 

 39; Xeue Beitr. viii, p. 60; Mon. X. A. Diptera, ii, p. 170 (all 

 Lyro'neurus ) . 



Male : Length 3-4 mm. Eyes widely separated by the front ; 

 antennae small, black. Thorax pale green with the hind part 

 and a central line bine or violet and with rather thick brownish 

 dust. Abdomen metallic green, blue or violet from the middle 

 of the second segment, tip with four strong bristles. Coxae 

 black with a more or less greenish tint, femora green ; tips of 

 femora and all tibiae brownish yellow ; pulvilli of fore tarsi not 

 enlarged ; tegulae pale yellow with dark brown cilia. Wings 

 "■ravish hvaline. 



Mex. 



14 Diaphorus vittatas n. sp. 



Male: Length 2 mm. Face wide and short, covered with 

 silvery white pollen, but black in certain lights ; front nearly 

 as wide as the face, bright green with very little pollen ; antennae 

 black, first joint long and slender, third joint large, pointed with 

 the arista inserted near the tip of this point ; palpi rather large, 

 white. Thorax and scutellum bright green with slight golden 

 reflections and almost without pollen, a not very sharply defined, 

 coppery vitta extends from the front of the thorax to the 

 scutellum : pleurae and coxae black, without much pollen, the' 

 former with greenish reflections. Abdomen metallic coppery, 

 more golden on the sides :. bristles at the tip very short ; hypo- 

 pygium small, its appendages small, black. Femora shining 

 green ; trochanters and tibiae sordid yellow ; fore and middle 

 tarsi becoming brown from the tip of the first joint ; tip of hind 

 tibiae and the hind tarsi brown ; the row of hairs on the lower 

 outer edge of the fore f emora long ; the lateral bristle at the base 

 of the middle tibiae small ; pulvilli of fore and middle tarsi a lit- 

 tle enlarged. Tegulae. their cilia and the halters yellow. Wings 

 grayish hyaline ; veins black ; first vein reaches nearly half the 

 distance to the tip of the second vein. 



Described from one male taken at Falls Church, Va., by 

 Mr. Nathan Banks in April. Type in Mr. Banks' collection. 



