AET. 12 KEYS TO SAPROMYZIDAE MALLOCH AND McATEE. 25 



GENUS TRYPETISOMA Malloch, new genus. 



This genus is erected for the reception of Sapromyza stictica Loew. 

 Characters as indicated in generic key on page 17. 



frenotype. — Sapromyza stictica LoeAv. 



T. stictica (Loew). — Originallj^ described from District of Colum- 

 bia material. F'or specific characters see key to species of Sapro- 



myza, p. IT. 



BIBI.IOGKAPHY. 



COQTjlLLf:TT, D. W. 



New species of Sapromyzidae. 



Can. Ent., vol. 30, no. 13, November, 1898. pp. 277-280. 



Describes Sapromyza magna from District of Columbia material, p. 27i). 



New acalyptrate Diptera from Nortli America. 

 Journ. N. Y. Ent. Soc, vol. 10, no. 4, December, 1902, pp. 3 77-101. 

 Describes Sapromyza glauca from Marlboro, Maryland, p. 177 . 

 Loew, H. 



Diptera Americae septentrionalis indigena. Complete work, 1872. 

 Describes the following three species from our region : 



Sapromyza umhrosa District of Columbia, vol. 1, p. 132. 

 Sapromnjza stictica District of Columbia, vol. 1, p. 133. 

 Lauxania flaviceps District of Columbia, vol. 2, p. 110. 

 Mali.och, J. R. 



Some uudescribed North American Sapromyzidae. 

 Proe. Biol. Soc. Wash., vol. 27, pp. 29-42, pi. 2, March 20, 1914. 

 Records seven species from the vicinity of Washington, District of Co- 

 lumbia, of which six are described as new. One of these Sapromyza 

 similata proved to have been previously described as S. disjunct a John- 

 son. 



Some new North American Sapromyzidae (Diptera). 

 Can. Ent., vol. 52 ,nos. 6-7, June-July, 1920, pp 12G-128. 

 Sapromyza fuscihasis, new species is described from Plummer Island, 

 ISIaryland. 



Some new genera and species of Lonchaeidae and Sapromyzidae (Diptera.) 

 Proc. Ent. Soc. Wash., vol. 25, no. 2, February, 1923, pp. 45-53. 

 Eight new species from this region are described. 

 Melander, A. L. 



A synopsis of the Sapromyzidae. 



P.syehe, vol. 20, no. 2, April, 1913, pp. 57-82, pi. 3. 



Records five species from the District of Columbia. 



EXPLANATION OF PLATES. 



Structural details of Lonchaeidae and Sapromyzidae. 



Figure 1. Lonchaea polita, hypopygium of male, ventral view, one side. 



2. Lonchaea toinnemana, head, dorsal view. 



3. Lonchaea nudifemorata, hypopygium of male, ventral view, one side. 



4. Lonchaea ivhmemana, w'ing. 



5. Minettia americana, hypopygium of male, ventral view, one side. 

 <i. Minettia americana, same, dorsal view, one side. 



