THE CANADIAN ENTOMOLOGIST. 



Aniobia distincta Towns. Senotainia trilineata V. & W. 



r. Radiomedial cross vein far be- i. Radiomedial cross vein at or 



fore tip of R2+3- close to tip of R2+3. 



2. Palpi black. 2. Palpi yellow. 



3. Parafacials at narrowest point at 3. Parafacials at narrowest point 



least 1.5 times length of 3rd about equal to length of 3rd 



antennal joint. antennal joint. 



4. The three black thoracic vittse, 4. The three or four black thoracic 



broad and conspicuous. vittœ narrow and incon- 

 spicuous. 



5. The abdominal markings (three 5. The abdominal markings not all 



rows of black triangles on distinct, 

 yellowish gray ground) very 

 distinct even without lens, 

 especially in male. 



6. Female with piercing ovipositor. 6. Female without piercing ovi- 



poster. 



Tachinophyto variabilis Coq., Siwàfloridensis Towns. 



Tachynophyto Towns., Trans. Amer. Ent. Soc, Vol. 19, p. 130, 

 1892, generic synonymy. 



Pseudomyothria Towns., 1892, loc. cit, 



Methypostena Towns., 1908, Tax of Muse. Flies. 



Lixophaga Towns., 1908, Tax of Muse. Flies. 



Hypostena of authors (non Meig). 



The above synonymy is pointed out by Mr. D. W. Coquillett in his 

 recent and valuable paper "The Type Species of North American Genera 

 of Diptera," p. 611. 



In the "Revision," page 62, key section No. 7, two species of the 

 above genus are separated, namely, variabilis Coq., and floridensis Towns. 

 The key reads as follows : — 



"7. Third segment of abdomen pollinose on at least the basal two-thirds, 

 the pollen yellowish, abdomen subopaque j 



length, 4-9 mm variabilis Coq. 



"Third segment at most pollinose on the basal third, the pollen 



white, abdomen subshining ; length, 4-9 mm . . .floridensis Towns." 



The characters riiade use of are purely colorational and since the 



publication of Co(iuilleti's valuable "Revision" larger series of the two 



species have been accumulated which cleaily demonstrate that such 



