E. T. CRESSON, JR. 65 



eral mesonotal area generally opaque, dusted, more so than the setulose area 

 above; median stripe generally distinct. Apices of hind femora distinctly 

 infuscated. In the male the fifth ventral segment is not visible on account 

 of the fifth dorsal closing around the base of the genital segments. Costa 

 not clouded, at most faintly so at and beyond second vein; stigma rarely 

 pale; rarely any fuscous streaks in first or second posterior cells. Length. — 

 8 to 10 mm. 



Specimens Examined. — 3 cf, 5 9 • 



Canada'. Britannia, Ontario, September 8, [Cornell]. 



New York: Ithaca, May to August, [Cornell]. 



Chaetotnacera silvatica Meigen 



1830. Tetanocera silvatica Meigen, Sys. Besch., vi, 41. 



Thi.s species, originally described from Europe, is aj^parently 

 represented in our fauna. I have compared specimens and can 

 see no reason for doubting their specific relation. 



cf. Similar to ferruginea, but the lateral shining frontal stripes complete, 

 and the anterior frontal margin also shining. The costal margin of the wings 

 faintly infuscated, but the stigma is yellow. Not so large asferrugineii, but 

 more of the build of elaln. 



But one, the following female, has been examined from our 

 fauna: Awcnie, ^Manitoba; Canada, June 24, (E. Criddle). 



POECILOGRAPHA Melander 

 1913. Poecilomyia Melander, Psyche, xx, 58, [nee Hendel, 1911]. 

 1913. Poecilographa Melander, Psyche, xx, 205. 



A. well marked genus, based on the anomalous Sapromyza decora 

 Loew. In the shape of the head there is a similarity to Chaeto- 

 rnacera valida and its allies, but in the present genus the epistoma 

 is more prominent. Further generic characters may be found 

 in the absence of propleural bristles; scutellum with four bristles; 

 frons with a broad, convex, polished, median area ^vhich includes 

 the ocelli and their bristles, and is separated from the orl)its by 

 a distinct grove; four frontal orl)itals; second antennal joint as 

 broad as long; third, as broad as second, sharjily pointetl; arista 

 black plumose; three dorso-centrals and the prescutellar pair, 

 present; n.ieso- and ptero-pleura setulose. Wings fuscous, with 

 numerous clear whitish spots. 



Poecilographa decora Loew (PI. I, fig. 11; pi. II, fig. 29.) 



1864. Sapromyza decora Loew, Berl. Ent. Zeit., viii, 97. (Cent, v, 96.) 



A species conspicuous in being pale yellow, mai'ked with large, 

 regularly arranged dark brown or black spots on the thorax and 



TRANS. AM. ENT. SOC, XLVI. 



