ART. 23 REVISION OF THE BEETLE GENUS OEDIONYCHIS BLAKE 23 



vittae. Antennae rather stout, not half so long as body, dark brown, 

 basal joints paler, third and fourth joints equal. Head broad, red- 

 dish brown, coarsely and somewhat eribrately punctate except on 

 middle of occiput, finely pubescent about eyes ; median groove usually 

 distinct, interocular space about half width of head. Pronotum 

 nearly three times as wide as long, arcuately narrowed anteriorly, 

 moderately convex, finely punctate, with rather narrow explanate 

 margin; an irregular piceous blotch often widening to a broad 

 scalloped fascia in middle. Scutellum rounded, shining, black. 

 Elytra broadly oval, convex, shining, punctate, punctation varying 

 from coarse punctures, tending to be confluent, to fine and shallow; 

 margin narrowly explanate, humeri rounded ; usually five moderately 

 broad vittae on elytra — a common sutural vitta, a median vitta, and 

 a submarginal vitta curving over humerus on each elytron, these last 

 two vittae not quite reaching apex, color of vittae usually greenish 

 black or piceous, occasionally with a bronze or purple luster. Body 

 beneath yellowish or reddish brown, finely pubescent, epipleura more 

 or less piceous. 



Length. — T.5 to 8 mm. ; width, 2.5 to 4.5 mm. 



Type locality. — Carolina. 



Distribution. — Pennsylvania, District of Columbia, Maryland, 

 " Carolina," North Carolina, Georgia, Florida, Alabama, Kentucky, 

 Mississippi, Oklahoma, Kansas, Texas. 



Horn described a variety hreviUneata from Florida " in which 

 with an entirely pale margin the disk is black or slightly bluish with 

 a short yellow vitta beginning within the humeral umbone." At the 

 opposite extreme there is a pale variety, which may be called 



OEDIONYCHIS PETAURISTA PALLIDA, new variety 



Head and antennae as in typical petaurista; pronotum with very 

 pale reddish brown spot or blotch, smaller than usual in typical 

 petaurista; elytra entirely lacking the median vittae, and with very 

 narrow sutural and submarginal vittae, producing an elytral pat- 

 tern closely resembling Lenia trilineata. 



Type and 1 paratype.—QdX. No. 29156, U.S.N.M. 



Type locality. — Tyler, Tex. 



Distribution. — Texas and Oklahoma. 



Described from two specimens in the National Museum, one from 

 Tyler, Tex., W. D. Pierce collection; the second labeled Ardmore, 

 Indian Territory (now Oklahoma), C. E. Jones collection. 



In Horn's collection are two specimens with the median vittae 

 interrupted, that is, represented only by traces, and the submargi- 

 nal vittae very narrow.^^ Apparently, as in other vittate species of 



i» See illustiation, Trans. Amer. Ent. Soc, vol. 16, pi. 5, fi:?. 2. 



