28 TIIOS. L. CASEY. 



deeply impressed, separated by their own widths, near the basal angles 

 agglomerated so as to form two distinct erosions. Elytra at base slightly 

 wider than the prothorax : sides feebly divergent posteriorly, feebly and 

 evenly arcuate, nearly as long as the width at base ; together broadly, 

 roundly, and very moderately emarginate behind ; suture as long as the 

 pronotum ; surface finely, evenly, and distinctly punctulate, punctures feebly 

 impressed, round, separated by twice their own widths, becoming slightly 

 more feeble posteriorly ; sutural striae strong, abdominal segments as broad 

 as the contiguous elytra ; border becoming nearly obsolete on the fourth and 

 fifth segments. Legs moderate ; first joint of the posterior tarsi very slightly 

 shorter than the next two together, much shorter than the fourth. Proster- 

 num very strongly punctured in its anterior half. 



M,ih. — Fifth ventral segment very broadly and rather feebly emarginate 

 tliroughout its width at apex ; sides of emargination nearly straight, angle 

 at bottom slightly rounded ; sixth segment narrowly and extremely deeply 

 incised at apex, incisure five to six times as deep as wide. 



Female. — .Sixth segment acutely rounded at apex. 



Length 1.2-1.4 mm. 



Michigan (Detroit, L. Sup.) 14 ; Cambridge, Mass., 3 ; Washington, 

 D. C, 1 ; Sand Pt., Fia., 1 ; Willets Pt., Long Id., 1 ; Delaware 1. 



The above description was taken from the male, the female antenna 

 does not seem to differ greatly from that of the male ; the puncta- 

 tion of tlie elytra appears to vary slightly in degree. 



111. £. atoniUS n. sp. — Form robust. Pubescence very fine, rather 

 short, very sparse, dark piceo-cinereous, inconspicuous. Color dark piceo- 

 fuscous, antennae, front of head and legs slightly paler. Head much broader 

 than long ; interocular surface broadly and moderately convex, highly 

 polished, very feebly and distantly punctulate toward the eyes ; broad 

 median line impunctate ; teeth of labrum nearly twice as long as the inter- 

 vals ; supra-antennal tuberculations rather small ; antennae very slightly 

 longer than the pronotum, joints three to six uniformly and gradually 

 decreasing in length, seventh thicker, very slightly elongated, sub-globular, 

 eightli smaller, globular, ninth very slightly wider than the seventh, broader 

 than long, last two joints abruptly much larger, last as long as the ninth 

 and tenth together; maxillary palpi moderate; mentura broadly and feebly 

 emarginate. Prothorax much wider than long; sides very rajndly divergent 

 and feebly sinuate for a very short distance posteriorly, then parallel and 

 nearly straight for a distance equal to nearly one-half the total length, then 

 strongly convergent to the base and very feebly sinuate ; anterior and poste 

 rior margins nearly equal in length and curvature, feebly arcuate ; posterior 

 angles broadly rounded ; disk highly polished, very feebly, distantly, and 

 irregularly punctulate, punctures very lightly impressed. Elytra at base 

 just perceptibly wider than the pronotum ; sides rather feebly divergent 

 posteriorly, evenly and moderately arcuate ; together broadly, roundly, and 

 moderately emarginate behind ; suture distinctly longer than the pronotum; 

 disk moderately convex, shining, wholly impunctate, more reddish in 



