30 Journal New York Entomological Society. IVoi. xxviii. 



presternum narrow, not dilated nor elevated at tip, coarsely and densely pubes- 

 cent posteriorly. Elytra conjointly a little transverse, apex truncate, apices 

 separately broadly rounded ; humeri slightly prominent ; elytra not margined, 

 epipleurse indistinct; scutellum arcuate-triangular, apex distinct. Abdomen 

 with two dorsal segments exposed second and third ventral segments very 

 short, combined not as long as the first, fourth or fifth, the latter the longest. 

 Middle and posterior legs compressed ; tibiae strongly dilated at apex with a 

 dense fringe of equal spinules. Tarsi dilated and spongiose beneath ; second 

 and third joints emarginate ; claws appendiculate. Length, 2.6-2.75 mm.; 

 width, 1. 25-1. 45 mm. i (5*, i $. 



(1^ — Keene Valley, Essex Co., N. Y., 28 June, igi8.) 

 Male. — Additional abdominal segment visible from above. 



This species seems closely allied to the European H. pulicarius 

 Linn. In the latter the punctuation of the head and propygidium 

 are said to be evidently (" merklich ") finer. (Gangl. Kaf. Mitt.-Eu., 

 Vol. Ill (II), p. 455-) In mordclloides the punctuation of the head 

 is not at all finer and that of the propygidium only very slightly finer. 



The genus Heterostomus has not been reported hitherto from 

 North America. In Dr. Horn's table of the Brachypterini, it would 

 be placed as follows : 



Claws distinctly toothed at base. 



Prosternum elevated at tip; elytral epipleurse distinct Brachypterus 



Prosternum not elevated at tip ; elytral epipleurae indistinct. . . Heterostomus 



Claws simple or nearly so. 



(^Cerciis, Amartus, Anthonccus.) 



Ludius (Corymbites) exilis new species. 



Form very elongate, elytra subdepressed. Head, thorax and underside 

 plumbeous black, elytra ochreous yellow; base and underside of the first anten- 

 nal joint, mandibles, labrum and prosternal lobe rufous, anterior angles of the 

 thorax narrowly and obscurely rufescent ; posterior angles and narrow basal 

 margin and the legs rufo-testaceous. Head concave and unmargined at middle 

 in front ; punctures above coarse, close and umbilicate ; antennae strongly ser- 

 rate, the second joint very short, scarcely longer than wide, third joint trian- 

 gular, similar to the fourth, terminal joint constricted near the apex. Thorax 

 as wide as the head at apex, about three fourths longer than wide, sides 

 parallel, rounded anteriorly near the angles, posterior angles produced, strongly 

 divaricate and distinctly carinate ; strongly sulcate on the median line, sulcus 

 not attaining the anterior margin, indistinct impression on the lateral declivi- 

 ties ; punctures coarse, dense and umbilicate on the sides, finer and sparser 

 on the disk. Elytra very slightly wider than the thorax, sides parallel to the 

 middle, thence very gradually and evenly attenuate to the apex ; striae fine, 

 not distinctly punctate, intervals slightly convex, rugulose and finely and 



