16 



UNITED STATES NATIONAL MUSEUM BULLETIN 207 



10. Acrobasis palliolella Ragonot 

 Figure 142 



Acrobasis palliolella Ragonot, N. Amer. Phycitidae, p. 4, 1887; 



Mcnograph pt. 1, p. 92, 1893. — Hulst, Phycitidae of N. 



Amer., p. 121, 1890. 

 Acrobasis albocapitella Hulst, Ent. Amer., vol. 4, p. 116, 1888. 



Not distinguishable superficially from feltella. Tri- 

 fling differences in the male genitalia are shown in the 

 figure. They are probably not significant. 



Type localities: North America (palliolella, in 

 Paris Mus.); Canada (albocapitella, in AMNH, ex 

 Rutgers). 



Food plant: Presumably hickory. Life history not 

 known. 



Distribution: United States: Illinois, Chicago 

 (July); Pennsylvania, New Brighton (July); North 

 Carolina, Plymouth (May); Connecticut, East River 

 (July). Canada: Ontario, Ottawa (July). 



The name palliolella has been variously misapplied 

 and has appeared frequently in economic literature for 

 the "pecan leaf casebearer" (juglandis LeBaron). In 

 our latest checklist (McDunnough, 1939) it appears as 

 a synonym oi juglandis but I do not think this is correct. 



A long series of juglandis before me shows consider- 

 able variation in color but at the same time consistent 

 differences from palliolella, whose closest aflinities are 

 feltella Dyar and caryalbella Ely. 



11. Acrobasis caryalbella Ely 

 Figure 143 



Acrobasis caryalbella Ely, Ins. Insc. Menstr., vol. 1, p. 52, 

 1913.— McDunnough, Check list. No. 6081, 1939. 



Acrobasis angusella Dyar (not Grote), Proc. Ent. Soc. Washing- 

 ton, vol. 10, p. 42, 1908. 



Ely distinguishes his species from Dyar's feltella 

 chiefly on the differences in their larval cases ("co- 

 coons"). There is nothing else to separate them except 

 some slight and probably not significant differences in 

 their genitalia. These are shown in the figure. 



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



Food plant: Hickory. 



Known only from reared examples from the type 

 locality and the female from hickory (June) without 

 locality label, bearing Riley's No. 376 and referred by 

 Dyar to angusella Grote. The sex-scaling on the male 

 is the same as that on feltella and palliolella. 



12. Acrobasis juglemdis (LeBaron) 

 Figures 138, 644 



Phycita juglandis LeBaron, Second annual report on the noxious 

 insects of the State of Illinois, p. 23, 1872. 



Acrobasis juglandis (LeBaron) Riley, Fourth annual report on 

 the noxious, beneficial and other insects of the State of 

 Missouri, p. 42. — Barnes and McDunnough, Contributions, 

 vol. 3, p. 221, 1917.— McDunnough, Check list. No. 6082, 

 1939. — Moznette (and others), U. S. Dap. Agr. Farmers' 

 Bull. 1829, p. 16, 1940.— Craighead, U. S. Dep. Agr. Misc. 

 Publ. 657, p. 449, 1950. 



Acrobasis nebulella Dyar (not Riley), Proc. Ent. Soc. Washing- 

 ton, vol. 10, p. 45, 1908. 



Acrobasis palliolella Dyar (not Ragonot), Proc. Ent. Soc. Wash- 

 ington, vol. 10, p. 44, 1908. — Forbes (in part), Cornell 

 Mem. 68, p. 617, 1923. 



Similar to the three preceding species except: White 

 basal area more or less shaded with ashy gray; without 

 rosy tints on lower basal and outer areas; generally 

 paler in outer area, mouse gray, with the white dusting 

 from midcosta somewhat more intense; a distinct 

 blackish costal triangle following the antemedial line. 

 Hind wing smoky fuscous shading to rather dull white 

 towards base on the male, darker and more uniformly 

 colored on the female. Alar expanse, 14-17 mm. 



Type locality: Illinois (tji^pe lost) . 



Food plants: Hickory, pecan, walnut, butternut 

 (larvae feeding on leaves, buds, and flowers) . 



Disteibution: Illinois, Chicago (July); Missouri; 

 Mississippi, Wiggins (May); Texas, Black Springs, 

 Brownsville (May), Cuero (June), KerrvUle (May, 

 June), Victoria (May, June); Georgia, Albany (July), 

 Atlanta, Blackshear (May, June), Cairo (May, June); 

 Florida, Monticello (May, Jime), Orlando (May), 

 Palatka (May), Tallahassee (May); South Carolina, 

 Mt. Pleasant (July); North Carolina, Edgecombe 

 County (May), Plymouth (May); District of Columbia, 

 Washington (June). 



A large reared series in the National Museum is 

 mostly from pecan. Also before me a series reared 

 from walnut and butternut that appears to be a suffused, 

 dark form of juglandis. Two specimens of the latter 

 series are from Ontario, Canada. 



In our Gulf States the species is of some importance 

 as a defoliator of pecan, and is popularly known as 

 the "pecan leaf casebearer." It has numerous refer- 

 ences in economic literature. I have retained only one 

 of these (Moznette, 1940), for it gives all the biological 

 raformation available on the species under its correct 

 specific name. Dyar's unfortunate identifications have 

 greatly confused the nomenclature, with the result that 

 most economic references previous to 1939 are under 

 nebulella or paUiolella. Hulst (Phycitidae of N. Amer., 

 p. 131, 1890) and Ragonot (Monograph, pt. 1, p. 120, 

 1893) are also at fault in applying the name juglandis. 

 Their descriptions apply to examples of indigeneUa and 

 not to the "pecan leaf casebearer." 



The sex-scaling of juglandis is like that on feltella. 



13. Acrobasis sylviella Ely 



FlQUHB 144 



Acrobasis sylviella Ely, Proc. Ent. Soc. Washington, vol. 10, 

 p. 161, 1908.— McDunnough, Check list. No. 6094, 1939. 



Forewing pale ashy gray; the basal area, thorax, and 

 head but slightly paler, not contrastingly whitish; no 

 triangular black spot on costa outside the antemedial 

 line, the dark outer border of the antemedial line a 

 narrow band or weak, diffused shade from costa. Hind 

 wing pale smoky fuscous on male, slightly darker on 

 female. Alar expanse, 19-21 mm. 



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



Food plant: Ostrya. 



Distribution: United States: Connecticut, East 

 River (July); Pennsylvania, New Brighton (May). 

 Canada: Ontario, South March (June). 



