105 



tliird Joint of aiiteniiie in the male six, in the female four, times :)j ^. 

 as long as the second, apical cell closed; length, 8 to 9 mm. (r^xy^-^ 

 Alameda County, Cal. (In Scudder's Butterflies of New Eng- ''^^'^-*-^'^ . 

 land, Vol. Ill, p. 1922; 1889.) : mnndersii Will. ^'*^%]X!l^. 



Sides of face below the frontal bri.stles bristly two-fifths of the dis- ^ 



tance to the vibrissa', arista thickened on the basal third, the 

 penultimate joint only slightly longer than wide; black, the 

 palpi, apex of scutellum, front corners of the second segment of 

 the abdomen, tibia', and sometimes base of antenna', yellowish; 

 front in male scarcely wider than, in the female one and one- 

 fourth times as wide as, eitlier eye, two pairs of orbital bristles 

 in the female, none in the male, frontal bristles descending to 

 the arista, cheeks nearly one-half as wide as the eye-height, 

 antenna' about as long as the face, the third joint six times as 

 long as the second; thorax gray ])ollin()se, marked with four 

 black vitta', scutellum bearing four pairs of marginal macro- 

 chtetie ; abdomen wholly gray pollinose and with reflecting darker <^'' xA^x^^^^tr^ 

 spots; wings hyaline, base of third vein bearing three bris- ^^^<*^^v 



ties, fourth vein beyond the bend distinctly arcuate, calypteres 

 white; length, 7 to 10 mm. San Diego, Tex. A specimen of 

 each sex collected April 30, 1895, by IMr. E. A. Schwarz. Type 

 No. 3G0G, U. S. jSTatioual Museum facialis u. sp. 



Unrecognized species. — P.? {Tachina) antomaf a Walker; U. S. P.? 

 {Tachina)meJobosis Walker. {Syn. Tachina addita Walker.) " 



Genus FRONTINA Meig. " rt^ - 'L«,^ri*~v H*-c^ ^^ h 



^"^SlI^ i-^^^-^OL, C^^^ - ^ X 

 Front'Dia Meigen, Systematisclie Bescli. Eur. Zweit. Insekten, VoK/VII, p. 247;A838. ^ 



I'rosopia Rondani, Dipterologiii- Italiciv Prodromns, Vol. 1\ , p. 36; 1861. 

 Acbofoueura Brauer and Bergenstamm, Zweif. Kais. Mns. Wieii, Y, p. 334; 1891. 

 Thysanomiiia Brauer aud Bergenstaiuni, loc. cit., p. 340.— ^jju l»-^»> 

 Farafrontina Brauer and Bergeustauiiu, loc. cit., VI, -p. 115; 1893. 



Brauer and Bergenstamm place Prosopea, Acha'toneura, and Para- 

 frontina as subgenera of Frontiiui; ' and althougli tlioy plaoo Tliyea 

 u omyia in a ditforont coction , it can not bo gonorioally ucparatcd from - 

 £j;o iitinft T.- Four Austrian specimens of Frontina laeta Meig., the type 

 species of this genus, received from and identified by Brauer and Ber- 

 genstamm, have the hind tibia^ outwardly ciliate, as in our species. 

 The latter have the palpi yellow, and from two to four bristles on the 

 base of the third vein : 

 1. With four sternopleural macrochaita', scutellum largely yellow and 



bearing three or four i)airs of long marginal and a short apical '•^fi^A-'^'-v 

 — — V e fY» e^«^ 



' Zweif. Kais. Mus. Wien, VI, p. 212; 1893. 



-Of two specimens of 7Vo«/i»/« ahiiw sent by Dr. Riley to Brauer and Bergen- 

 stamm, one was referred by them to Prosopea aud the other to Thysauomyia; of 

 three specimens of Frontina archippivora, one was by them referred to Parafroutina 

 and two to Acha'toneura, and of fifteen specimens of i'Vow/tna/reHc/ri?, they referred 

 one to Hemimasicera, two to Prosopea, and twelve to Acha'toneura. 



