18 THOS. L. CASEY. 



slightly longer than broad, ovulate, wider behind the eyes ; surface very 

 feebly, coarsely and sparsely punctate, except along a broad median space, 

 also uniformly and minutely granulate ; eyes very flat, on the sides of the 

 head, much more than their own length in advance of the posterior angles, 

 covered sparsely with erect setae ; labrum short, broad, feebly emarginate ; 

 antennae very finely pubescent, scarcely longer than the head. Prothorax 

 anteriorly equal in width to the head, arcuately widening to a point slightly 

 in advance of the middle, where it is distinctly broader than long ; sides 

 thence nioderat(!ly convergent and arcuate posteriorly ; basal angles so 

 obtuse as to be almost imperceptible ; posterior margin broadly, evenly, and 

 very strongly arcuate, anterior margin almost transverse ; surface very feebly 

 and evenly punctate, minutely and strongly granulate. Elytra at base as 

 wide as the prothorax ; sides nearly parallel, distinctly shorter than width 

 at base and moderately arcuate ; each elytron nearly squarely truncate 

 behind, with the angles rounded, truncation very feebly arcuate ; surface 

 depressed, sculptured like the prothorax, granulation finer and more indis- 

 tinct. Abdominal segments of equal width ; border strong, erect, and very 

 deep ; surface very obscurely granulate, granulation stronger on the fifth 

 segment, which is also sparsely and very feebly punctulate ; posterior mar- 

 gins transverse. Legs short ; femora and tibiae deep piceous-brown, tarsi 

 piceo-testaceous. Under surface of abdomen covered sparsely with rather 

 short, fine, recumbent setae. 



Mnle. — Sixth ventral segment produced at apex ; sides sinuous ; tip ob- 

 tusely rounded. 



Female. — Sixth segment broadly and acutely angulate at tip ; sides straight. 



Length 3.0-4.0 mm. 



Atlantic Cit}!, New Jersey; Fortress Monroe, Va. 



Tliis is a common species, found under debris cast up by the waves 

 on tlic sea-const; it bears a certain resemblance to botli Aleocliara 

 und llomalota. 



Eu.^STIlETIXI. 



Of the three genera which compose this tribe — Eucesthetus, Eda- 

 plius, and Stictocranius — the first is the only one, the representatives 

 of which seem to be in any degree numerous ; but nothing positive 

 can be stated in regard to numbers, owing to the excessive minute- 

 ness of the insects and the consequent ditUculty of collecting them. 



T.'pon a careful and long-continued study of the Stenini, as well as 

 a somewhat thorough review of the Pa^derini, it appears evident to 

 me that the three genera in question can belong to neither of these 

 tribes, altliough most closely allied to the former, by the almost 

 cxattly similar structure of the antennae, oral organs, and thorax, in 

 addition to the like position of the antennae upon the front ; it differs 

 very greatly in the character of the eyes, sculpture, structure of the 

 mentuni, color and density of tlie integuments, and more especially 



