6 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 68 



Bezzi ''' places Ocjjptern in Dexiinae. Baer ' does the same. Stein's 

 posthumous work ^ treats all muscoids with hypopleiiral bristles as 

 the single family Tachinidae, without introdiicin<>- subfamilies. 



In the United States, Coquillett ^ included Ocyptera in his Tachi- 

 nidae. Townsend ^" in 1912 placed Cylindromyia in a tribe dylin- 

 dromyiirii of the subfamily Phaniinae, family Exoristidae; he added 

 the unique suggestion that the tribe Qonipsilurini would go in the 

 same subfamily. In a manuscript outline of his classification, sub- 

 mitted quite recently, he puts the tribe Cylindronvyiini in the family 

 Phasiidae. 



In the present paper it is proposed to consider Cylindromyia the 

 chief member of the small subfamily Cylindromyiinae of the family 

 Tachinidae. No attempt will here be made to analyze the other 

 components of the group. 



Biology. — About a century ago, Dufour observed the parasitism 

 of the European Cylindromyia hicolor Olivier on the Pentatomid 

 Rhaphigaster gnsea Fabricius;'^ he figured adult and larva. 

 Nielsen has given a report of some studies of his own, of Cylindromyia 

 hrassicaria Fabricius parasitic on another Pentatomid, Dolycoris 

 haccarum}'^ He found larvae in the first and third stages at the 

 same time in the last of July, but only one in each host. He noted 

 that the larva hibernates in its host in the second stage, and that 

 it does not kill the host, even at the time of exit. It pupates in the 

 ground. He thinks the fly is ovoviviparous (Pantel's group 9). 



Caffrey and Barber, in Bulletin 779 of the United States Depart- 

 ment of Agriculture, have noted on page ;^1 that they reared eight 

 specimens of C ylindroinyia armata (as Ocypterodes euchenor 

 Walker) from adults of the Pentatomid Chlorochroa sayi Stal at 

 Maxwell, New Mexico. I correct the species from one of the speci- 

 mens. Townsend reported the rearing of euchenor by Forbes in 

 Illinois from Acrididae and from Leucania u)iipu?icfa; ^^ but these 

 records may well be doubted, as all the others are from Pentatomidae. 



KliY TO NORTH AMERICAN .SPKCIES OF CYLI XDUO-MY lA 



1. Scutelluin with only one pair of bristles (fig. 17) ; abdomen with discnl niac- 

 rochaetiie (widespread; dosiadcs Walker) dosiades Walker. 



Scutellum with two pairs of bristles — a small decussate apical iiair and 

 another much larger not far from them (fig. 16) 2 



Scutellum with three pairs of bristles, the additional pair being near the 

 base at the sides (fig. 15) 4 



"Kat. Pal. Dipt., vol. 3, 1908, p. 42!). 



"Die Tachincii, 1921, p. 157. 



SArch. f. XaturKescli., p. 96, 1924. 



» Revls. Tacliin., 1897, p. 86. 



»» Prop. Ent. Soc. Wash., vol. 14, p. 48. 



"Annales Sci. Nat., vol. 10, 1827, pp. 246-260, pi. 11. 



" Entom. Medd., ser. 2, vol. 4, 1909, pp. 76-81. flss. 



" Psycho, 1893, p. 400. 



