Banks, Greene, McAtee, and Shannon — Dist. of Col. Diptera. 195 



APPENDIX. 



SYSTEMATIC AND SYNONYMIC NOTES. 



By R. C. Shannon. 



Chrysogaster greenei new species. 



Male: Shining, dark steely blue. Face fairly prominent, very dark 

 greenish black with a broad gentle swelling in the middle ; the parts of 

 the transverse, silvery poUinose band extending outward to the eyes from 

 below the base of the antennae are very narrow. Wings shaded very 

 slightly. Length 6.5 mm.; wing 5.5 mm. 



Female: Body very broad ; very dark greenish black. The longitudinal, 

 median ridge down the frons rather broad. Face shining, very dark 

 green ; rather prominent ; the epistoma well developed ; the transverse 

 band on each side between the eye and antennae narrowed. Mesonotum 

 with very sparse, insignificant, whitish pile. Abdomen very broad, 

 ovate. Wings clouded apically. Length 7.5 mm.; wing 6.5 mm. 



Described from two males and two females: Falls Church, Virginia, 

 April 27, 1915 (C. T. Greene); for records of paratypes see p. 177. 



Type Cat. No. 20453, U. S. N. M. Male type; female allotype. 



This species falls into "group four" in my table of species for this 

 genus (Froc. Ent. Soc. Wash. XVIII, 1916, pp. 102, 103). The male is 

 distinguished from the males of nigripes and inflatifrons by its shining 

 dark steel blue color but is very close to texana. Texana has the face 

 shining steely blue and more flattened ; the band a little broader between 

 the eyes and antennae; and its wings more clearly hyaline. The female 

 is readily recognized by its very broad appearance. Texana, female, has 

 slightly more abundant pile on the frons ; the longitudinal ridge down 

 the frons narrower ; the face more bluish, less prominent; the transverse 

 band broad and even all the way across ; the mesonotum more bluish and 

 with more abundant pile ; and the wings clear hyaline. 



This species is named in honor of Mr, Charles T. Greene, who has done 

 extensive collecting and rearing in the Syrphidse. 



Key to the Local Species of Chilosia. 



1. Eyes and face hairy primoveris Shannon. 



Eyes bare, face with pile only along eye margins ^. 



2. Scutellum without marginal bristles ; body with Ught pile. 



capillata Loew. 

 Scutellum with marginal bristles 3. 



3. Arista long-plumose, shining steely blue species . . cyanescens Loew. 

 Arista short-pubescent 4- 



4. Legs mostly yellow ; female with face, humeri and scutellum in 



part yellow pallipes Loew. 



Legs mostly black, tibiae partly yellow ; female with face, humeri 



and scutellum black similis n. sp. 



