36 THE CANADIAN ENTOMOLOGIST. 



Wings : root, costal cell, three-fourths of the first basal and the abbre- 

 viated cross-band brown. The second basal cell is usually filled as far as 

 the first, but more obscurely. There is sometimes a trace of a cloud 

 beyond the stigma. The cross-band does not attain the posterior margin 

 but crosses the fifth cell, the proximal end of which frequently contains a 

 hyaline spot. A halo along the distal margin. 



Seventeen $ . June, Milford, N. H. One $ in Cambridge Museum. 



This species is near sordidus O. S., but is smaller, lacks the gray pos- 

 terior margins of the abdominal segment, the cross-band is more abbre- 

 viated and lighter colored, and the second basal cell is farther infuscated. 



C/uysops nigribimbo. 



£ • Length 5-6 m. m. Face ferruginous. Callosities and cheeks 

 dark brown. Palpi brownish. Antennae black, basal joint yellowish. 

 Front cinereous, callus and ocellar space black. Thorax and abdomen 

 black, sometimes viridescent, the thoracical lines obsolete. Legs varying 

 from black to fulvous ; the front coxae, proximal half of front tibiae, and 

 the base of the four posterior tarsal joints being lighter colored. Wings : 

 costal cell and stigma yellowish. Cross-band obsolescent, existing only 

 as a brownish-yellow tinge usually vanishing entirely before it reaches the 

 posterior margin, which it sometimes does in the fourth cell. First basal 

 cell filled with the same tinge as cross-band. Second infuscated at 

 extreme base only. In some examples a faint apical cloud is visible under 

 the lens, occupying the extreme distal part of marginal and submarginal 

 cells. 



Milford, N. H. Abundant in Pine woods in July. 



Chrysops cursiin. 



% . Length 7-8 m. m. Face, cheeks and palpi yeliow. Antennae 

 yellow, annulate portion black. Front covered with yellow pollen. 

 Frontal callus fulvous margined above with an interrupted black line. 

 Space around ocelli black. Thorax greenish-brown with yellowish 

 stripes. Scutellum greenish-gray, usually with a transverse fulvous streak. 

 Abdomen yellow. Second segment with two oblique oval spots anteriorly 

 connate, attaining neither margin. The remaining segments with emar- 

 ginate transverse stripes on the anterior portion. In some examples these 

 stripes are abbreviated, forming two spots similar to those on the second 

 segment and decreasing to the fifth. Venter yellow, apically infuscate. 



