484 U- S. NATIONAL MUSEUM BULLETIN 2 1 6 part 3 



with a white oand that covers about 4 segments; wings hyaline to 

 weakly infuscate, the front wing with a more or less distinct broad 

 infuscate band just before areolet and its apex infuscate. In some of 

 the small males with hyaline wings the markings on the front wing are 

 entirely absent. 



Specimens: 9, reared from Agrilus champlaini in Ostrya virginica, 

 Lyme, Conn., Apr. 28, 1913, H. B. Kirk (Washington), cf , reared 

 from twig infested with Agrilus, Orlando, Fla., 1919, W. W. Yothers 

 (Washington). 9, Naubinway, Mich., June 6, 1957, H. Townes 

 (Townes). 9, Mount Washington, N. H. (Washington), cf. Sag 

 Harbor, N.Y., Mar. 7, 1949, Roy Latham (Washington), cf, Ithaca, 

 N.Y., May 14, 1930, P. P. Babiy (Townes). 9, McLean Eeservation, 

 Tompkins Co., N.Y., May 22, 1937, H. Townes (Townes). 9, reared 

 from borer in Populus, Hymers, Ont., June 10 to 19, 1913, H. Dawson 

 (New York), cf , Jockvale, Ont., May 28, 1934, G. S. Walley (Otta- 

 wa), d", Aylmer, Que., May 25, 1934, G. S. Walley (Ottawa), d', 

 reared from Oberea praelonga in Cornus stolonifera, Hull, Que., May 

 9, 1956, S. D. Hicks (Ottawa). 9, Hull, Que., May 26, 1923, R. 

 Ozburn (Ottawa). 2c?, BoUvar, W. Va., Sept. 22 and 24, 1942, H. 

 Townes (Townes). 9, reared from Saperda Candida, May 18 (Townes). 



This subspecies ranges from southeastern Canada to Florida. 



4b. Xylophrurus nubilipennis mibilipennis (Cresson) 



Cryptus nubilipennis Cresson, 1864, Proc. Ent. Soc. Philadelphia, vol. 3, p. 291; 

 ?. Lectotype: ?, Colorado (Philadelphia). 



Male: Unknown. 



Female: Black. Orbit narrowly fulvous except in front below; 

 clypeus and mandible largely ferruginous ; flagellum with an incomplete 

 white band covering about 2.7 segments; scutellum and propodeum 

 sometimes mostly ferruginous ; wings tinged with brown, the front wing 

 with a brown band just before areolet and its apex brownish; legs 

 beyond trochanters ferruginous, the basal 0.3 of front tibia infuscate, 

 all tibiae more or less infuscate, and all tarsi fuscous bro^'iTi. 



Specimens: 9 (lectotype), Colorado (Philadelphia). 9, "Betula 

 fontinalis,^' Larkspur, Colo., George Hofer (Washington). 



4c. Xylophrurus nubilipennis abdominalis, new subspecies 



Male : Specimens which are presumed to represent the male of this 

 subspecies are black, with the hind and upper front orbits narrowly 

 marked with fulvous, mandible partly ferruginous, front legs partly 

 brownish, and wings with a uniform weak infuscation. 



Female: Black. Orbit with a narrow fulvous mark behind and 

 above in front; clypeus and mandible mostly f ul vof erruginous ; scape 

 in front and basal three segments of flagellum more or less fulvous; 



