113 



three segmeuts gray polliuose, with retlecting black spots, 

 .second and third segmeuts bearing marginal macrochtet*, the 

 fourth wholly covered ; front pulvilli of male longer than the 

 last tarsal joint ; wings hyaline, third vein bearing three or four 

 bristles at the base, fourth vein beyond the bend arcuate, calyp- 

 teres white; length, 10 mm. Pullman, Wash. Two males and 

 three females bred by Prof. C. T. Piper from Schizura ipomoece. 

 Type No. 3614, U. S. National Museum schizurw n. sp. 



^ Genus MASICERA Macq. f .S^^-fc^J^ ^5^^*!^^ 



Masicera Macquart, Histoire Naturolle Insectes, Dipteres, Vol. II, p. 118; 1835. ^^^jiT/h,L.a,.fj,ti:^ 

 Ceroniasia Koudaiii, Uipterologin' Italica^ Prodronuis, Vol. I, p. 71; 1856. c ■^^.^u^-x.^i.JM-^, ^*2i^ 



i)exorfcs Brauer aud Bergenstamtn, Zweif. Kais. Mus. Wien, IV, p. 87; 1889. . j y_^s^ 



Hemimasicera Brauer and Berseustamni, loc. cit. 



' ^<rv-i.v-v^ft..*^ 



The last-named authors place Dexodes and Hemimasicera as sub- **-2_- 

 genera of Ceromasia, and retain Masicera as a distinct genus.^ A ^ 

 comparison of species placed by these authors in both of these so-called 

 genera shows that they are too closely related to be separated into 

 different genera : -n,-<u„«^ 



1. Thorax bearing four postsutural macroch{et?e/\two or more on front 



side of each middle tibia near the middle, apex of abdomen 



black ■ :L'yi^ ^' 



Thorax bearing only three postsutural andAthree sternopleural 

 macrochoet?e, .second and third abdominal segmeuts bearing 

 discal as well as marginal ones .^- 4. 



2. Second and third segments of abdomen bearing discal macrochiTetfe, 



apical pair on scutellum nearly horizontal 3. 



Second and third segments^ destjtut,e of discal macrochatie ; black, 

 ^ the second anteunal .'joiiit, palpiia,nd usually the scutellum except^ 

 the base,,>yellow ; front of female one gii^ one-tourth times/as 

 wide as either eye, two pairs of orbital bristles/yjiairs on sides of 

 front short and sparse, .frontal bristles descending to base of 

 third antennal joint, cheekS|'over one-fourth as broad as the eye- 

 height, facial ridges bristly on the lowest third to half, antennae 

 five-sixths as long as the face, the third joint three times as long 

 as the second, arista thickened on the basal three-fifths, the 

 penultimate joint shorter than broad; thorax gray pollino.se, 

 marked with four black vittu', four sternopleural macrochiieta?, 

 scutellum bearing two long and two short pairs of marginal 

 ones, the apical pair almost erect; abdomen on last three seg- 

 ments gray pollinose, their apices sometimes shining, the bristly 

 hairs depressed; wings hyaline, third vein bearing two bristles 

 at its base, hind crossvein and the fourth vein beyond the bend 

 almost straight; calypteres white; length, 5 mm. Atlanta, Ga., 



'Zweif. Kais. Mus. Wien, VI, pp. 211, 212; 1893. 

 3359 8 



