34 PROCEEDINGS OF THE NATIONAL MUSEUM voi. 70 



is to be distinguished from Oe. quercata by its pale margin. Oe. 

 quercata^ moreover, has reddish head and prothorax (not yellowish 

 brown), and is without any darker occipital spot. The dark form 

 of Oe. subvittata is to be separated from Oe. saltatra by its wide 

 elytral margins. It is to be separated from Oe. circumdata by its 

 broader and more rounded elytra, the elytra in Oe. cvrcumdata 

 tending to be quadrate in shape. 



27. OEDIONYCHIS SEXMACULATA (Illiger) 



Fig. ;hi 



Haltica sexnutculata Illiger, Mag. f. Inset-kteiikunde, vol. G, 1807, p. 104. 

 Haltica palUata Randall, Bost. Journ. Nat. Hist., vol. 2, 1838, p. 47. 

 Oediontfchis sexmaculata Crotch, Proe. Acad. Philadelphia, vol. 25, 1873, p. 

 63.— Horn, Trans. Amer. Soc, vol. 16, 1889, p. 193. 



Small, oblong, dull yellow brown, deeply and coarsely punctate, 

 the pronotum with piceous or reddish brown spots, and elytra with 

 irregular, zigzag markings and a lateral fold parallel to margin of 

 elytra. Antennae barely half length of body, moderately stout, 

 basal joints paler, third and fourth joints equal. Head with occiput 

 rounded, reddish brown or piceous, front paler, coarsely punctate; 

 median groove not distinct, interocular space half as wide as head. 

 Pronotum nearly three times as wide as long, with wide explanate 

 margin, nearly rectangular, slightly narrowed anteriorly, coarsely 

 punctate ; generally two oblique, reddish brown or even piceous 

 marks on either side, sometimes meeting at anterior half, in middle 

 at base a brown spot. Scutellum dark brown. Elytra oblong, nar- 

 row, with humeral prominences and a sulcus within continuous 

 nearly to apex, thus forming a lateral fold parallel to margin ; mar- 

 gin moderately wide ; punctations coarse and deep ; a reddish brown 

 or piceous spot on humerus, oblique mark at basal fourth, some- 

 times meeting and forming a V at suture, a broad marginal spot 

 below this, these marks sometimes running together to form a nar- 

 row zigzag across the upper half of elytra, a broad zigzag fascia 

 across lower half of elytra, occasionally breaking up into spots. 

 Body beneath yellow or reddish brown, finely pubescent; epipleura 

 pale. 



Length. — 2.8 to 4 mm.; width 1.5 to 2 mm. 



Type locality. — Pennsylvania. 



DistHhutio7i. — Massachusetts. Connecticut, New York, New Jer- 

 sey, Pennsylvania, Maryland, District of Columbia, Virginia, North 

 Carolina, Georgia, Florida, Alabama, Louisiana, Texas, Ohio, In- 

 diana, Illinois, Michigan, Missouri, Kansas, Oklahoma, Nebraska. 



This is a most distinctive species on account of its small size, its 

 deep, coarse punctation, and the lateral fold on the elytra. It is the 



