Art. 23 GENUS CYLINDROMYIA MEIGEN ALDRICH 15 



Avliich are small and turned up very close to the apical angle iu 

 profile. It does not have any groups of short spines below. 



Length, 9 to 11.5 mm, 



Redescribed from 156 specimens of both sexes. 



In the National Museum: Fifty-nine specimens from District of 

 Columbia and adjacent Maryland and Virginia, collected by McAtee, 

 Jackson. Viereck, Quinter, Greene, Shannon, Rohwer, Clemons, 

 Aldrich, Crawford, Townsend, Knab, and Walton; 7 from Harris- 

 burg, Pennsylvania and vicinity (Walton) ; others from Chesa- 

 peake Beach, Maryland (Townsend) ; Tazewell, Virginia (Jack- 

 son) ; Calhoun F., South Carolina (Titus) ; Miami Beach, Florida 

 (Snyder); Tennessee; Lafayette, Indiana (Aldrich); Marion 

 County, Indiana (Dietz) ; Algonquin, Illinois (Nason) ; Mound, 

 Louisiana (Jones) ; Onaga, Kansas (Crevecoeur) ; Dallas, Texas 

 (Jones); Wolf Cit3\ Texas (Bishopp). In all 80 specimens. 



In the Canadian Collection : Eleven from Teulon, Manitoba 

 (Hunter) ; 1 from Pelican Lake, Manitoba (Criddle) ; 1 from Fort 

 Coulonge, Quebec; 3 from Lawrence, Kansas (Curran). 



In the Kansas Collection : Atchison, Douglas, Leavenworth, Lyons, 

 Chase, Johnson, Coffey, Marion, Smith, Allen, and Osage Counties, 

 Kansas, collected by Beamer, Bare, Breaker, Brown, and Darby; 

 Brookings, South Dakota (Aldrich); Ames, Iowa; Knoxville, Ten- 

 nessee (Summers) ; Canada; Illinois (Forbes) ; District of Columbia. 

 In all 56 specimens. 



In Professor Hine's Collection: Five specimens from Vinton and 

 Ira, Ohio (Hine) ; and Newark, Ohio (Osburn). 



CYLINDROMYIA EUCHENOR Walker 



(Figs. 8, 31 j 



Ocyptera euchcnor Walker, List. Dipt. Brit. Mus., vol. 4, 1849, p. 695. 

 Ooypterodes euchcnor Townseni>, Proc U. S. Nat. Mus.. vol. 49, 1916. p. 631. 



Townsend designated euchenor Walker as type of his genus 

 Ocypterodes; the specimen so labeled by him belongs to the si3ecies 

 herein described as new under the name vulgaris. For euchenor' 

 as reared from a Pentatomid by Caffrey and Barber, see ai^iata. 



The species here selected as the true euchenor is the one agreeing 

 w^ith the type, as made out by Major Austen from my key and some 

 numbered specimens that I sent him (his letter October 14, 1923). 



It is strikingly similar to argentea in almost every detail, but 

 easily recognizable by the male genitalia and the females can also 

 be separated without any difficulty. In the male the posterior for- 

 ceps are .soft and swollen, subglobose, almost white, with a minute 

 beak on the anterior side at the tip, between the anterior forceps. 

 The soft cushionlike swelling of the posterior forceps is very re- 

 markable. 'Jliere seems to be no separation between the forceps 



