ART. 23 REVISION OF THE BEETLE GENUS OEDIONYCHIS BLAKE 25 



brown, irregular spot on either side or these united into a large 

 blotch. Scutellum rounded, shining, black. Elytra broad with wide, 

 rounded apex and moderately wide explanate margin, humeral 

 prominences rounded but not marked, basal sulcus within; puncta- 

 tion indistinct, fine and sparse, deeper punctures along suture and in 

 basal sulcus; a wide, black, sutural vitta at base covering one-third 

 of either elytron and tapering to apex, and a lateral vitta, gradually 

 widening from humeri and covering at middle half of elytron, 

 leaving narrow, yellow, median space of regular width and only half 

 as wide as lateral and sutural vittae; explanate margin yellow; 

 sutural vitta not quite reaching apex, lateral vittae truncate before 

 reaching apex. Body beneath finely pubescent, piceous except for 

 yellow epipleura and margin of prosternum. 



Length. — 7 to 7.5 mm. ; Avidth 4 to 4.5 mm. 



Tyjje.—ln British Museum. Paratype, Cat. No. 29354 U.S.N.M. 



TyjJe locality. — North America. 



Described from two specimens from the DeJean collection in the 

 British Museum, labeled Oe. petaurista from " Amer. bor." Permis- 

 sion has kindly been granted to deposit the paratype in the United 

 States National Museum. The shape of the prothorax with its wide 

 explanate margin and the broadly arcuate elytra, wider below the 

 middle, as well as the markings on head and elytra, differentiate this 

 from petaurista. It is much larger than Oe. miniata, as well as hav- 

 ing pale yellow markings above and being deeply piceous below, 

 with elytral vittae much wider and closer to the margin. This can 

 not be Oe. horni because von Harold describes that species as being 

 densely punctate and not shining, comparing it with miniata, which 

 he says is much more finely punctate. On the contrary, Oe. ampli- 

 vittata is remarkable for being smooth and shining. The species 

 may prove to be a Central American one. 



17. OEDIONYCHIS MINIATA (Fabricias) 



Figs. 18, 19 



Galleruca miniata Fabricius, Syst. Eleuth., vol. 1, 1801, p. 495. 

 Alticu miniata Olivieb, Ent., vol. 6, 1808, p. 685. 



Oedionychis fallax Mexshkimeb, Proc. Acad. Philadelphia, vol. 3, 1847, p. 162. 

 Oedionychis miniata Crotch, Proc. Acad. Philadelphia, vol. 25, 1873, p. 62. — 

 HoKN, Trans. Amer. Ent. Soc., vol. 16, 1889, p. 187. 



Broadly oblong-oval, convex, moderately shining, yellow brown 

 with reddish brown band across pronotum, a reddish brown or pice- 

 ous common sutural vitta and a median vitta on each elytron. An- 

 tennae barely half length of body, stout, reddish brown or darker, 

 three basal joints reddish, third joint shorter than fourth. Head 

 reddish-brown, coarsely punctate, sometimes occiput and surface 



