Vol. XI) CURRAN— REVISION OF THE PIPIZA GROUP 353 



bluish, and some have a very small tubercle above an- 

 tennal base. Some females have front of same bluish 

 color, and others a broad, shallow pit below middle of 

 front. 



Twenty-five males and seven females, Guelph and 

 Vineland, Ontario, April to June. 



8. Pipizella modesta (Locw) (Fig. 2, 12, 38) 



Triglyphus modestus Loew (Female), Century, iv, No. 

 62, 1863. 



Pipiza nigribarba Loew (Male), Century, vi, No. 40, 

 1865; Williston, Synop. N. Am. Syrph., p. 25, 1886. 



Pipiza modesta (Loew) Williston, Synop. N. Am. 

 Syrph., p. 24, 1886. 



Habitat: New York, (Lw.) Ontario! Very much like 

 P. fraudulenta but more robust, face entirely black 

 pilose, antennae more pointed at end, wings always 

 lighter colored. 



Length, 6.5 to 7 mm. Male: Face and front shining black; head entirely 

 black pilose except a few hairs at vertex; horizontal bare stripe of eyes almost 

 obsolete; Antennae entirely black or sometimes reddish below at base, third 

 joint usually reddish below. Pile of thorax luteous, of pleura; whitish, mixed 

 with black above ; of scutellum lutescent with a row of longer black hairs around 

 edge. Abdomen with usual opaque areas, pile of usual colors but the lighter 

 pile inclined to be yellowish; legs as in fraudulenta. Wings cinereous hyaline 

 with basal third clear; last section of third vein curved before its middle and 

 much more parallel to edge of wing than in fraudulenta; last section of fifth 

 vein nearly straight, subrectangular. 



Female: Similar to female of fraudulenta but with the horizontal bare 

 stripe of eyes narrower, almost obsolete; antennae much more pointed below; 

 pile inclined to be slightly yellowish. The shape of the antennae, together with 

 the pilose base of the arista and larger size, will at once distinguish the female. 



I place P. nigribarba of Loew here, although not ab- 

 solutely certain of the synonymy. In any case the 

 above described sexes belong together, and, should this 

 female prove to differ from modesta, the species would 

 be nigribarba. 



With regard to the validity of fraudulenta, I disagree 

 with Williston. The two species are certainly distinct 

 but very confusing, especially as fraudulenta may have 

 the base of the third antennal joint somewhat reddish 

 but the darker wings seem to be more constant. I have 

 never seen modesta with cinereous wings. 



Nine males and seven females, Vineland and Guelph, 

 Ontario, April to late June. (Curran). 



