, 
92 
Hubneria, and Aporomyia as synonyms of Exorista, and Brauer and 
Bergenstamm make all of them (with the exception of Aporomyia) 
synonyms of Parexorista, placing the latter and Nemorilla as sub- 
genera of Exorista. Aporomyia they place in a separate section, 
Polidea, but an examination of a specimen received trom them under 
the name of Aporomyia dubia, the species upon which Rondani founded 
this genus, proves that it should not be separated from Exorista. 
Blepharidea, Sisyropa, and Myxexorista they place in as many different 
sections, even putting Blepharidea in two sections, once in the section 
Masicera and a second time in the section Phorocera. <A careful 
examination of specimens referred by these authors to these three 
genera failed to reveal a single generic character for separating them 
from each other or from typical species of Exorista. Moreover, of 
four specimens of Hxorista eudrye submitted to these authors by 
Dr. Riley, two of the specimens were referred by them to Sisyropa 
and two to Myxexorista; and of three specimens of EHvorista flaviros- 
tris, two were referred by them to Sisyropa and the remaining speci- 
men to Myxexorista. These authors give Phryxe as a synonym of 
Blepharidea. 
Our species of Exorista are as follows: 
1. Second and third segments of abdomen bearing discal as well as 
mareinal macrocheetee > 2.5 2. bac epee eee ee 2. 
Second and third segments destitute of discal macrochieter . - -- 14. 
2, With, three sternopleural macrochete-----ci sos. se] - ee oe 5. 
With only two sternopleural macrochetie, male destitute of orbital 
bristles, hind tibisve outwardly ciliate, apical cell open. -...-- 3. 
3. Thorax bearing four postsutural macrochetie, palpi partly or wholly 
VOlLGW: ccca'e saek = a- Gikee bigs Sen ee 4, 
Thorax bearing ouly three postsutural macrochete, scutellum black, 
hairs of abdomen short, depressed, middle tibize: each bearing a 
single macrocheta on the front side near the middle; palpi yel- 
low, front in the male one-half, in the female five-sixths, as wide 
as either eye, third joint of antennie three and one-half times as 
long as the second; length, 6 to 9 mm. Franconia, N. H.; 
Philadelphia, Pa., and northern Illinois. (Canadian Entomolo- 
gist, Vol: XTX, pi 62 -Sept..1830;)- 9222 eee blanda O.S. 
4. Seutellum yellow, hairs of abdomen rather long and suberect, mid- 
dle tibire each bearing two or more macrochietie on the front side 
near the middle, front in the male one-half, in the female five- 
sixths, as wide as either eye, third joint of antennze two and one- 
half times as long as the second; length,8 to 10mm. Franconia, 
N. H., Michigan, Tennessee, Georgia, California, and Austria. 
A female specimen from the Schiner collection, received from 
3rauer and Bergenstamm under the name of Parewxorista che- 
lonie Rond. (Dipt. Italicee Prod., Vol. III, p. 120; 1859. 
_ Sisyropa sp., Brauer and Bergenstami tn litt.)...chelonie Rond. 
