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 Xemorilla as sub- 
genera of Exorista. Aporomyia they place in a separate section, 
Polidea. but an examination of a specimen received from 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 Exorista eudryce submitted to these authors by 
Dr. Riley, two of the specimens were referred by them to Sisyropa 
ami two to Myxexorista; and of three specimens of Exorista flaviros- 
tris. two were referred by them to'Sisyropa ami 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 segmeuts of abdomen bearing discal as well as 
marginal inacroclnetae 2. 
Second and third segments destitute of discal macrocha'ta' II. 
2. With three sternopleural macrocha'ta' 5. 
With only two sternopleural macrocha'ta-, male destitute of orbital 
bristles, hind tibiae outwardly ciliate, apical cell open 3. 
3. Thorax bearing four postsutural macrocha'ta', palpi partly or wholly 
\ el low 4. 
Thorax bearing only three postsutural macrocha'ta', scutellum black, 
hairs of abdomen short, depressed, middle tibia' each bearing a 
single macrocha'ta on the front side near the middle; palpi yel- 
low, front in the male one-half, in the female live sixths, as Avide 
as either eye, third joint of antenna- three and one-half times as 
long as the second: length, to mm. Franconia, N. II.; 
Philadelphia, Pa., and northern Illinois. (Canadian Entomolo- 
gist, Vol. XIX. p. L62; Sept., 1887.) blanda <>. 8. 
4. Scutellum yellow, hairs of abdomen rather long and snberect, mid- 
dle t ilme each bearing two or more macrocha'ta' 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 antenna* two and one- 
half times as long as the second ; length, 8 to 10 mm. Franconia, 
N. II., Michigan, Tennessee, Georgia, California, and Austria. 
A female specimen from the Schiner collection, received from 
Brauer and Bergenstamm under the name of Parexorista che- 
lon'uv Bond. (Dipt. Italic* Prod., Vol. Ill, p. 120; 1850. 
Sisyropa sp., Brauer and Bergenstamm in litt.). . .chelonia Rond. 
