AMERICAN COLKOI'TERA. 398 



rather finely punctured, except along the hasal margin, where tlie punctures 

 hecouje somewhat larger; dorsal channel distinct in its basal two-fifths, ill-defined 

 l)eyond, a small and rather ohtuse tubercle each side. Klytra less than one-third 

 wider at the base than the prothorax, gradually narrowed from tlie humeral 

 callus ])ostei-iorly, strife wide, not deeply impressed punctures large, somewhat 

 remote, interspaces moderately convex, each with a row of transverse tubercles 

 which, however, become obsolete on the two or three outer interspaces; under- 

 side coarsely punctured, each puncture bearing a pale scale. Length 3.3 4.0 mm. ; 

 0.125-0.16 inch. 



%. Last ventral segment with a wi'll defined, coarsely punctured fovea. 



9 . Last ventral transversely impressed before the apical margin. 



Hab. — Lake Superior, Michigan, Pennsylvania (ilazleton). 

 It is with pleasure that I dedicate this species to the memory of 

 Dr. John I^eConte. 



A€ANTIIOSCRLIS gen. nov. 



Under this generic term I have separated from its near allies that 

 heterogenous aggregation of forms heretofore known in our lists and 

 collections as Coeliodes acephnlux and ciirtus. The formation of the 

 ventral segments at once separate it from Gdiodes, which, indeed, 

 it resembles very little in general habitus. Its nearest relative is 

 Cnetutxjoii ((.•<, witii which it agrees in the pectoral canal not extend- 

 ing beyond the mesosternum and in the presence of tiie apical pro- 

 cess of the anterior tibite, and from which it difiers in habitus and 

 the absence of the acute tooth near the base of the tibiae. 



The beak is moderately stout, nearly straight, shorter and cylin- 

 drical in the male, somewhat attenuated and shining towards the 

 a[)cx in the female; scrobes expanding posteriorly, antennal funicle 

 7-jointed. The eyes are rather large ; prothorax convex, ample, 

 constricted at the apex in all (except pus'dlus), lateral tubercles 

 acute, small, .<cutel not visible. Elytra at most very little longer 

 than wiilc; prosternum moderately long in front of the coxie, pec- 

 toral canal sharply defined and extending upon the mesosternum, 

 metasterniun shoit ; .second ventral segment shorter than the two 

 following united, prolonged at the sides, the third segment narrowly 

 attaining the lateral margin. The legs are generally rather stout, 

 though slender in some, femora not toothed, posterior stouter than 

 anterior and middle, tibiie very variable, anterior with the external 

 apical angle produced into a toothed |)rocess, the nnddle and poste- 

 rior wTth a broadly triangular or even rectangular tooth above the 

 apex, or else subangulate or simple ; tarsi variable, claws bifid. 



The following analytical tal)le of species is based on a critical ex- 



TK.^NS. AM. KNT. SOC. XXIII. (50) NUVKMBEU. 1896. 



