70 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



and rugose; pronotum dark reddish cupreous, with a feeble purplish 

 tinge on the median part, becoming broadly aeneous toward the sides, 

 and the surface coarsely, deeply, transversely rugose; elytra black, 

 with a feeble bluish or violacous reflection in certain lights; beneath 

 bronzy green, except the abdomen, which is cupreous and strongly 

 shining; antennae with the outer joints distinctly longer than wide. 

 Genitalia similar to those of arcuatus Say. 



Length, 7.5 mm. ; width, 1.75 mm. 



Female. — Above and beneath uniformly brownish cupreous, and 

 sometimes with a feebly aeneous tinge ; antennae with the outer joints 

 about as long as wide. 



Redescribed from the male type (No. 1 of the arcuatus series) in the 

 Museum of Comparative Zoolog}^, Cambridge, Mass. 



Type locality. — " Kentucky." 



DISTRIBUTION 



Material examined: 



Connecticut: New Haven, July 31, 1911 (Champlain). Storrs (Brooks). 

 Illinois: Galesburg (Stromberg). Urbana, June 14, 1910 (Vestal). Edge- 

 brook, June 20-27 (Liljeblad). Rock Island, July 4, 1912 ( ). 



Indiana: Hessville, June 18, 1911 ( ). 



Kentucky: No definite locality. 



Maryland: Glen Echo, July 8. 1923 (Malloeh). 



Massachusetts: Melrose (Dodge). Ashland, June, 1892 ( ). 



Mississippi: Agricultural College, July 1, 1913, on pecan (Hester). 



New York: Poughkeepsie, June 22, 1903 ( ). New York City, July 4. 



18S2 (Soltau). 

 Pennsylvania: Hummelstown, reared (Knull). 

 Rhode Island: Providence, July 5, 1920 (Nylen). 



Virginia: Petersburg, Pulaski, Richmond, and Round Hill, reared (Brooks). 

 West Virginia : Morgantown, Pickens, Buckhannon, Moorefield, Great Cacapon. 



Clarkesburg, and French Creek, reared (Brooks). 

 Also recorded from Michigan: Detroit and Marquette (Hubbard and Schwarz). 



Variations. — Rather uniform in size and coloration. The pre- 

 humeral carinae vary somewhat in distinctness, and the scutellum 

 is strongly carinate in some examples, whereas in others the carina 

 is entirely absent. 



Hosts. — This subspecies does considerable damage to hickory and 

 pecan trees in nurseries and nut-tree orchards in the eastern part of 

 the country, by pruning off small branches and terminals. It has 

 been reared from various species of Hickory {Hicoria sp.) by Knull 

 and Brooks. 



Horn (1891) has confused the varieties of arcuatus, as the variety 

 listed by him as obliquus LeConte is torquatus LeConte, and the one 

 listed as torquatus is obliquus, which is a synonym of arcuatus Say. 



