36 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



29. OEDIONYCHIS NIGROSIGNATA Schaeffer 



Fig. 33 



Oedionychis nigrosignata Schaeffer, Journ. New York Ent. Soc. vol. 27, 

 1919, p. 333. 



Elongate oval, pale yellow, moderately shining, with black-spotted 

 elytra. Antennae slender, half the length of body, basal joints paler, 

 third and fourth joints about equal. Head faintly and finely punc- 

 tate in front, occiput shining, median groove distinct, interocular 

 space less than half width of head. Pronotum over twice as wide 

 as long with a moderately narrow explanate margin, not so thinly 

 transparent as in scalaris, arcuately narrowed anteriorly, shining, 

 very faintly punctate. Scutellum pale. Elytra elongate oval, with 

 slight humeral prominences, and narrow margin, shining, nearly 

 impunctate; on each elytron black spots or blotches as follows: 

 On humeral prominence, a common spot at basal fourth at 

 suture, sometimes in part disappearing, one opposite this medially, 

 a larger blotch a little below middle, one on lateral margin, and 

 one at apical fourth in middle, these spots varying in size and some- 

 times in part disappearing. Body beneath finely pubescent, pale. 



Length. — 4.5 to 5.5 mm. ; width 2.5 mm. 



Type locality. — Brownsville, Tex. 



Distribution. — Texas. 



This species is generally narrower than scalaris^ and is smooth 

 and shining. It differs also in the narrower margin of the prothorax 

 and in having feebly marked humeral prominences. 



30. OEDIONYCHIS SPILONOTA. new species 



Fig. 34 



Elongate oval, feebly shining, yellow with piceous sutural vitta, 

 this not reaching apex, each elytron with a narrow black basal 

 edging and five or six black spots. Antennae slender, half length 

 of body, pale, third and fourth joints nearly equal, the fourth 

 slightly longer. Head finely and rather densely punctate, a piceous 

 spot on occiput; median depression distinct, interocular space a 

 little less than half width of head. Pronotum over twice as wide 

 as long witli moderately wide explanate margin, arcuately narrowed 

 anteriorly, shining, with few, scattered, indistinct punctures. Scutel- 

 lum black. Elytra elongate oval-oblong, a little wider at base than 

 prothorax, with narrow explanate margin and small h\imeral promi- 

 nences, shallowly and rather coarsely punctate ; a narrow black mar- 

 gin at base often uniting with spots on humeri, a usually piceous 

 sutural vitta. extending from basal fourth to apical three-fourths. 



