170 THE CANADIAN ENTOMOLOGIST. 



14. Sixth segment of abdomen, in lateral view, not much longer than high 



(Wawawai, Wash.) deplanata Cresson. 



Sixth segment of abdomen, in lateral view, very much longer than 

 high (Willowmore, Cape Colony ; Brauns) pe?ietairix Smith. 



15. All the apical teeth of abdomen (including lateral ones) very short and 



blunt ; spines of anterior coxœ strong, covered on outer side with 



snow-white hair ; fourth abdominal segment with a subbasal hair 



band in the transverse sulcus (New Mexico). . . .soledadensis Ckll. 



Apical teeth of abdomen at least partly elongated or sharp. . . ... 16. 



1 6. Fourth ventral segment emarginate 17. 



Fourth ventral segment entire 18. 



1 7. Emargination of fourth ventral segment wide, the segment not produced 



in middle j hair on eyes short. . .grifidelice, subsp. denverensis Ckll. 

 Emargination of fourth ventral small and narrow, in a produced 

 median lobe ; hair on eyes long (Beulah, New 

 Mexico) rufitarsis, subsp. r/icis Ckll. 



18. Lower apical teeth of abdomen very sharp; very small species 



(California) angelica Ckll. 



Lower apical teeth of abdomen obtuse 19. 



19. Hair of eyes short ; face narrower (Las Vegas, New 



Mexico) griîideliœ Ckll. 



Hair of eyes very long (Olympia, Wash.), .ribis subsp. kificaidi Ckll. 



A CORRECTION. 



In the key to the species of Metopia given in my last paper on 

 Tachinidse (Can. Ent., Vol. XLIII, Nos. 8 and 9), I have stated that in 

 Metopia lateralis the third abdominal segment bears six or seven marginal 

 macrochsetse, while in Metopia leucocephala it bears only a single pair. 

 This distinction was based upon the study of a few specimens after I had 

 left the National Museum, and a re-examination of a large series of 

 specimens of both sexes shows that the character is a variable one. In 

 both lateralis and leucocephala the number of marginal macroch?etae on 

 the third abdominal segment varies from two to six or seven. The 

 tendency to the development of a considerable number of strong setae 

 seems to be more marked in the males than in the females. 



I am indebted to Mr. H. E. Smith, of the Gipsy Moth Laboratory, 

 who called my attention to the inconstancy of the character. 



W. R. Thompson, Naples, Italy. 



