HELEOMYZID FLIES NORTH OF MEXICO—GILL EYAL 
Schroederella iners (Meigen) 
FiaureEs 66, 67 
Helomyza iners Meigen, 1830, p. 57. 
Helomyza longiseta, var. b, Zetterstedt, 1847, p. 2445. 
Blepharoptera iners (Meigen), Loew, 1859, p. 63. 
Leria iners (Meigen), Pandellé, 1901, p. 346.—Aldrich and Darlington, 1908, p. 82. 
Scoliocentra latimanus Schroeder, 1913, p. 173 and 335. 
Schroederia iners (Meigen), Czerny, 1924, p. 102. 
Amoebaleria (Edioamoeba) luteoala Garrett, 1925, p. 3—Czerny, 1930, p. 448. 
New synonymy. 
Schroederella iners (Meigen),-Czerny, 1927a, p. 35. 
Schroederella iners (Meigen) is very similar to the preceding species, 
except that the general coloration is a reddish or yellowish brown. 
The short spines along the distal edge of the surstylus in S. iners 
(Meigen) are more numerous towards the anterior and posterior 
corners. 
Distripution.—lIowa, Illinois, Minnesota, Michigan, Ontario, 
New Hampshire, Massachusetts; September—November. 
Remarks.—This species was collected alive off snow in November 
1933 by D. Denning at Plummer, Minn. The previous lowest fall 
temperature that year had been —12° F. These data are taken from 
a specimen in the collection of the University of Minnesota. 
Genus Scoliocentra Loew 
Helomyza Fallén, Meigen, 1830, p. 47 (part).—Zetterstedt, 1838, p. 764 (part); 
1847, p. 2430 (part). 
Leria Robineau-Desvoidy, Schiner, 1864, p. 28 (part).—Pandellé, 1901, p. 344 
(part).—Aldrich and Darlington, 1908, p. 77. 
Scoliocentra Loew, 1859, p. 43; 1862b, p. 127.—Czerny, 1924, p. 136; 1927a, 
p. 40.—Collin, 1943, p. 246. 
Achaetomus Coquillett, 1907, p. 75.—Aldrich and Darlington, 1908, p. 70. 
Amoebaleria Garrett, 1921, p. 125 (part). 
The haired mesopleura and pteropleura, combined with the presence 
of a pair (rarely 2 or 3 pairs) of sternopleural bristles, will readily dis- 
tinguish members of this genus. 
Key to the Species of Scoliocentra 
1. Hind tarsus shorter than hind tibia; foretarsus only slightly longer than fore- 
tibia . =: . . . . thoracica Collin 
Hind tarsus not phorics fant find Hib: foretnreue 1. 25 to 1.5 times the length 
ofstoretibiaus |. ya. arent eee 
2. Thorax reddish orange; peierion aerecucnirel uiatles of male much weaker 
than the posterior dorsocentrals. . .. . . . . . tineta (Walker) 
Thorax dark gray; anterior dorsocentral prcties &: male not conspicuously 
weaker than the posterior dorsocentrals. . .... . . . fraterna Loew 
