AMERICAN MOTHS OF THE SUBFAMILY PHYCITINAE 



21 



27. Acrobasis dyarella Ely 



Figure 157 



Acrobasis dyarella Ely, Proc. Ent. Soc. Washington, vol. 12, p. 67, 

 1910.— McDunnough, Check list, No. 6099, 1939. 



Head yellow gray. Thorax much suflFused with red 

 scaling. Basal area of forewing red dusted with whitish 

 towards costa; scale ridge black, followed outwardly by 

 a broad red band which extends and diffuses outwardly 

 towards costa, obscuring and partially obliterating the 

 blackish costal triangle; red scaling generally scattered 

 over lower median area of wing; some obscure whitish 

 dusting on median costal area and about the small, 

 separated discal spots; sub terminal line faint, bordered 

 inwardly and outwardly, except on costa, by reddish 

 lines; terminal area and dark markings otherwise, dark 

 gray. Hind wing glossy, pale smoky fuscous. Alar 

 expanse, 19-20 mm. 



Type locality: East River, Conn, (type in USNM) . 



Food plant: Unknown. 



Represented only by the male type (Aug.) and female 

 paratype (Sept.). 



28. Acrobasis ostryeUa Ely 



Figure 158 



Acrobasis ostryella Ely, Ins. Insc. Menstr., vol. 1, p. 54, 1913. — 

 McDunnough, Check Ust, No. 6084, 1939. 



Similar to dyarella except: Reddish color more gener- 

 ally diffused over outer areas of forewing, not forming 

 a strongly accented band following the scale ridge, and 

 of a purplish red shade; the coastal triangle and scale 

 ridge contrastingly black. Hind wing dark smoky 

 fuscous. Alar expanse, 15-18 mm. 



Type locality: East River, Conn, (type in USNM). 



Food plants: Ostrya virginiana, Carpinus. 



Distribution: United States: Connecticut, East 

 River (July) . Canada: Ontario, South March (June) . 



29. Acrobasis secundella Ely 

 Figure 159 



Acrobasis secundella Ely, Ins. Insc. Menstr., vol. 1, p. 55, 1913. — 

 McDunnough, Check list, No. 6083, 1939. 



Doubtfully distinct from ostryella. The holotype 

 and one other reared male from the type locality and 

 two Canadian specimens before me are darker and a 

 nearly uniformly suffused pm-plish, with a pale dusting 

 on basal area of forewing, and about the discal spots a 

 rather faint and pale gray rather than white. However, 

 other reared specimens from hazel are a perfect match 

 for the type of ostryella. Alar expanse, 15-18 mm. 



The male genitalia show a trifling difference in the 

 length of the lateral projections of the apical projection 

 of gnathos. Ely states that the larval case of secundella 

 is longer and more slender than that of ostryella; but 

 the life history needs further investigation before any 

 such difference can be evaluated. 



Type locality: East River, Conn, (type in USNM). 



Food plant: Corylus. 



Distribution: United States: Connecticut, East 

 River (July). 



Canada: Ontario, Merivale (June). 



30. Acrobasis coryliella Dyar 

 Figure 160 



Acrobasis coryliella Dyar, Proc. Ent. Soc. Washington, vol. 10, 

 p. 47, 1908.— Ely, Ins. Insc. Menstr., vol. 1, p. 53, 1913. — 

 Forbes, Cornell Mem. 68, p. 618, 1923. — McDunnough, 

 Check list, No. 6098, 1939. 



Forewing a dull, rather lusterless gray, paler in the 

 central area and without any reddish or purpUsh 

 shading; following scale ridge on inner margin a faintly 

 ocherous patch obscured by gray scaling; the scale ridge 

 and other dark markings blackish, but the usual black 

 triangle on costa following antemedial line replaced by 

 a narrow line; the usual transverse dark shade from 

 inner upper edge of subterminal line to middle of lower 

 margin; subterminal line bordered inwardly by a narrow 

 blackish line ; discal dots normally confluent, forming a 

 curved line along discocellular vein of cell. Hind wing 

 pale smoky fuscous; darker on female. Alar expanse, 

 17-20 mm. 



Type locality: Unspecified [New York?] (type in 

 USNM). 



Food plant: Corylus. 



Distribution: New York; Connecticut, East River 

 (July, Aug.); Massachusetts, Newton Highlands; Illi- 

 nois, Decatur (June, July), Putnam County (June, 

 July). 



In addition to a long series reared from hazel at East 

 River, Conn., there are three specimens from the 

 Fernald and Brooklyn Museum Collections (one male 

 and two females from Illinois) labeled "Acrobasis 

 hebescella," the two females labeled "type"; and one 

 male from Decatur, 111., which McDunnough had 

 tentatively identified as A. sylviella Ely. 



The species is easy to recognize from its rather uni- 

 form gray shade and strongly contrasted, short, black 

 scale ridge. 



31. Acrobasis hebescella Hulst 



Acrobasis hebescella Hulst, Phycitidae of N. Amer., p. 126, 1890. — 

 Ragonot, Monograph, pt. 1, p. 109, 1893. — Barnes and 

 McDunnough, Contributions, vol. 3, p. 194, 1916. — 

 McDunnough, Check list. No. 6085, 1939. 



The only authentic representation of this species is the 

 female type, which is in very poor condition but ap- 

 parently does not, or did not originally, differ in any 

 significant detail from coryliella Dyar except as to its 

 host. It was reared from a cocoon found on oak. This 

 may or may not be significant. The name is just 

 another of those that must wait for clarification until 

 someone shall make a careful and more thorough 

 study of the life histories of the various Acrobasis 

 species. Alar expanse, 16.5 mm. 



Type locality: "Jersey pines, June" (type in 

 AMNH, ex Rutgers). 



Food plant: Oak. 



32. Acrobasis cirroferella Hulst 



Acrobasis cirroferella Hulst, Canadian Ent., vol. 24, p. 60, 1892. — 

 McDunnough, Check list. No. 6109, 1939. 



The type is a male without abdomen. There is no 

 sex-scaling. Close to coryliella, but with dark areas of 



