354 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Genus Heringia Rondani (Fig. 28 a-g, 42) 



Face black, front slightly swollen; antennae short in 

 males, long in females; arista microscopically pilose to 

 tip; males with venter of fourth segment only about 

 half as long as its dorsum, and the hypopygium longer 

 than in related genera, inclined to the right; middle 

 tibiae slender in both sexes; wings as in Pipiza. The 

 females may be distinguished from allied genera by the 

 narrow face, evenly pilose eyes, slender middle femora 

 and larger size. Type of genus Heringia heringi Zett. 

 (Europe). 



Key to Species of Heringia 



I. Females. 



1. Antennae entirely black comutata 

 Antennae partly yellowish 2 



2. Thorax entirely finely white pilose (eastern) salax 

 Thorax with longer, yellowish white pile (western, 9 mm.) californica 



II. Males 



1. Pile mostly reddish yellow (western) californica 

 Pile mostly whitish or blackish 2 



2. Abdomen mostly whitish pilose 3 

 Abdomen mostly brownish or blackish pilose 4 



3. Front entirely black pilose . canadensis 

 Front partly white pilose (larger, western) comutata 



4. Third joint of antennae twice as long as wide, reddish yellow below; 



hypopygial grippers yellow salax 



Third joint of antennae 1J^ times as long as wide, bright yellow 



below; hypopygial grippers piceous; wings dark brownish intensica 



9. Heringia canadensis, new species (Fig. 17, 32) 



Habitat : Ontario ! Small, black, whitish pilose ; front- 

 al triangle above and abdomen opaque. 



Length, 5.5 mm. Male: Face and frons shining black, sides narrowly 

 whitish pollinose; frons black pilose, opaque above; face white pilose, in profile 

 gently rounded from antennae to mouth; above antennae a well marked carina, 

 shaped like an inverted V ; vertical triangle black pilose with whitish pile behind ; 

 eyes short brownish or blackish pilose with white pile below; posterior orbits 

 white pollinose; below and at the vertex white pilose, elsewhere with black 

 pile; occipital cilia black. Thorax and scutellum slightly shining, finely white 

 pilose, with a few black hairs about humeri; scutellum with apical groove. 

 Abdomen opaque black; first segment, a triangular spot on sides of two fol- 

 lowing, apical corners of fourth and its hind margin and hypopygium shining 

 black; pile black, usual areas with whitish or cinereous pile; fourth segment 

 below only half as long as above; hypopygium two-thirds as long as fourth 

 segment. Legs black, blackish pilose; tips of femora, narrow base of hind and 

 broader base of anterior four tibiae, and first joints of middle tarsi, yellowish, 

 other tarsal joints piceous. Wings infuscated; stigma yellowish; last section 

 of fifth vein straight. 



