ART. 17. NORTH AMERICAN PHOROCERA — ALDRICH AND WEBBER. 73 



of head at vibrissae greater; bucca wider; face at narrowest part 

 wider; front at vertex wholly silvery pollinose; hind tibiae sub- 

 ciliate at most, etc. 



Type.— Msile, Cat. No. 25718, U.S.N.M. 



PHOROCERA PLURISERIATA. new species. 



Front of male 0.300 of head width, silvery, the vitta equally as wide 

 as either parafrontal; frontal bristles arranged in several irregular 

 rows, the two uppermost bristles of the inner row being stout and 

 reclinate, face silvery, the sides at narrowest part one-third the 

 width of the median depression; bristles of the facialia in a single 

 row; bucca one-fifth the eye height; eyes thickly hair}'; palpi yel- 

 low; antennae nearly as long as face, the third joint five times the 

 length of the second, arista thickened on the basal three-sevenths, 

 penultimate joint short. Thorax grayish, pollinose, marked with 

 four black vittae bearing three dorsocentral macrochaetae ; scutellum 

 black on the basal fourth, the apex yellowish with three long and one 

 short cruciate pair of marginal bristles ; disk thickly beset with fine 

 long hairs, excepting at its apex which is bare, no bristles. Abdo- 

 men black, gray pollinose, especially so at the base of segments, 

 first segment with marginals, tlie remaining ones with both discal 

 and marginal macrochaetae. Femora and tarsi black, the tibiae 

 brownish; mid tibiae bearing two bristles on the outer front side 

 near the middle; hind tibiae ciliate with one longer bristle near 

 middle ; front pulvilli twice as long as those of the hind tarsi. Wings 

 hyaline, apical cell open about one-half the length of the small cross 

 vein, co.stal spine short and of the same length as the adjacent 

 bristles, third vein with two bristles at its base. Hypopygium 

 blackish, the inner forceps with a slight swelling at base and about 

 the same length as the outer ones, the former near the base, with 

 a striking tuft of long black hairs three times the length of the 

 forceps. 



Length 10 mm. 



Described from one male specimen collected at Grizzly Peak, 

 Berkeley Hills, California, received in exchange from the Academy 

 of Natural Sciences, Philadelphia. 



7V;>^.— Male, Cat. No. 95719, U.S.N.M. 



PHOROCERA FUSCIMACULA. new species. 



Front of male 0.28-0.30 the head width: parafrontals at vertex 

 and nt arly to the base of antennae subshining blackish : the frontal 

 bristles reach below the arista, in the male they are in several irreg- 

 ular rows, in female there is but a single row of stout bristles with 

 smaller ones outside; bucca one-fourth the eye height; parafacials 

 silvery, with dark reflecting spot above, at their narrowest part (in 

 male) about one-fourth the width of the median depression; facialia 



