FLIES OF THE GENUS ODINIA — SABROSKY 229 



male, Glen Echo, Mel., July 4, 1921, J. R. Malloch (det. Malloch as 

 0. maculata Meigen); male, Plummer's Island, Md., Aug. 3, 1915, 

 at light, R. C. Shannon (det. Shannon as 0. picta Loew); female, 

 Springfield, Mass., Dimmock (No. 1841a). 



The type locality, an island in the Potomac River a few miles above 

 Washington, D. C, and slightly above Plummer's Island, is now 

 called Turkey Island. 



In addition to the above I have also seen two specimens in poor 

 condition, a male from Glen Echo, Md. (same data as paratype), and 

 a female from Springfield, Mass., Dimmock (No. 1843bb). 



The two females reared by Dimmock were stated in his notes to be 

 ' parasites," and were reared under the following circumstances: 

 No. 1841a, from tenebrionid larva {1 Scotohates) under decaying bark 

 of Populus grandidenfata, the odiniid emerging from the beetle 

 larva and pupating about May 8, 1901, and the adult fly emerging 

 about June 5, 1901; No. 1843bb, from a number of tenebrionid larvae, 

 apparently all Scotobates calcaratus (Fabricius), in decaying wood of 

 Popvlus grandidentata, the fl}'" larvae emerging and pupating May 23, 

 1901, and the flies appearing June 5, 1901. 



This species is the largest that I have seen in the genus. It is 

 distinguished from others with the same standard wing pattern by 

 the combination of light colored body and broad, dark wing spots. 

 In the revision of Palaearctic species by Collin (1952), it would 

 appear to key to 0. xanthocera Collin on the basis of the yellow an- 

 tenna, but that species is described as much smaller (3 mm.), with 

 a distinct brown stripe on upper mesopleuron, no upper orbital 

 hairs, antero ventral spm' on mid tibia only half the length of ventral 

 spur, and the spots on the crossveins small and faint. 



3. Odinia boletina (Zetterstedt) 



Milichia boletina Zetterstedt, 1848, Diptera Scandinaviae . . . , vol. 7, p. 2721 

 (Sweden). 



This species is characterized by the pale wing, the hind crossvein 

 being indistinctly or not at all infuscated, and the other spots rather 

 weak and indistinct. The upper part of the plem'on has a broad 

 brown stripe, the upper orbits are bare, and the mid tibia ventrally 

 has one long and one short apical bristles. 



I have seen fom- females (in CDA) which agree with European 

 material, and are recorded as boletina, at least pending further study 

 by comparison of male genitalia: Hemmingford, Quebec, June 21, 

 1929, J. B. Maltais; Ottawa, Ontario, July 5, 1938, G. E. Shewell; 

 Waterton, Alberta, July 13 and 15, 1923, H. L. Seamans. 



