THE CANADIAN ENTOMOLOGIST. 19 



2. citprarius, Linn. This is the species known as nebeculosus, Z tt., in 



collections. Not rare. Woods Hole, Mass. (July) ; Newark, N. J. 

 (June) ; Penn.; Chicago, 111. (June-July). 



3. decerns, Say. Kiamesha, N. Y. (June); New Bedford, Mass. (May); 



Phila , Penn. ; Ontario ; Algonquin and Chicago, 111. ; Austin, Tex.; 

 Vancouver Island. June and July. 



4. vlridis, Say. Mich. ; London, Ontario ; Chicago, 111.; Denver, Col. 



May and June. 



5. elegans, Loew. Opelousas, La. May and June. 



6. Texamis, sp. nov. 



Male : Eyes contiguous, subcontiguons in front of the antennae; front 

 and face black ; antenna^ reddish, the style black ; proboscis yellow ; 

 ocelli equidistant, ocellar triangle metallic black, with fulvous pile. 

 Thorax polished green, scntellum and metathorax somewhat more bluish ; 

 pile of thorax fulvous, erect, ai)pearing dense when viewed from the side; 

 humeri and a line to the root of the wing yellow; pleura black. Abdomen 

 metallic green, with erect fulvous pile, sexual organs testaceous ; venter 

 piceous, becoming metallic posteriorly. Legs, including coxae, completely 

 yellow. Halteres yellow. Wings lutescent, veins yellow. Length, 6 mm. 



Female: Front and vertex green, their sides parallel, medially 

 bisected by a iine impressed line, which also separates the transversely 

 lunate frontal white spots. Between the antennae and the frontal marks 

 the ground colour is piceous. Otherwise as in the male. 



Described from two males and one female collected by the writer at 

 Austin, Texas, one bearing the date of April 28, 1900. 



Although not a typical Sargus, this species is placed in this genus, as 

 it is closely related to elegans, Loew. From elegans it may be distin- 

 guished by the shorter contiguity of the male eyes (in elegans the eyes are 

 contiguous up to the ocellar triangle), by the lack of frontal spots in the 

 male, the wholly green thorax and the black pleura. 



Ptecticus. 



The two species occurring in the United States may be separated as 

 follows : 

 Front black above ; hind metatarsi black, remainder of hind tarsi 



white Sackenii, Williston. 



Front wholly yellow ; hind tarsi brown trivittatus, Say. 



P. trivittatus, Say. {P. similis, W'ill.). 

 A single female from Pennsylvania. 



