192 NORTH AMERICAN 



except on tlie abdomen where they are much more sparse, and, except near 

 the sides, are so narrow as to almost lose the appearance of scales. Head 

 small, finely and strongly granulate; eyes moderate, slightly prominent, 

 rather coarsely granulate ; beak somewhat robust, as long as the head from 

 the anterior limit of the eyes and prothorax together, very feebly enlarged 

 fi'om base to tip, the latter appreciably flattened, surface strongly granulose, 

 very obscurely and longitudinally ruguloso-punctulate, not striate ; near the 

 ti}} there is a small polished space and four short setae, two apical and two 

 lateral ; antennae attached slightly beyond the middle poiut, scape much 

 longer than the funicle, very slender, rather abruptly davate at tip, funicle 

 ()-jointed, first robust and elongate, distinctly longer than the next two 

 together, second longer than Avide, slightly narrower and distinctly longer 

 than the third which is wider than long, club compact, elongate, oval, 

 acuminate at tip. Prothorax widest at one-third the length from the base 

 where it is almost twice as wide as the medial length ; sides rather strongly 

 arcuate, feebly convergent toward the basal angles and feebly sinuate near 

 the apex, the latter about one-half as long as the base, broadly emarginate ; 

 base nearly transverse; disk convex, very feebly constricted throughout at 

 the apical third, very coarsely deeply and closely punctate, interspaces about 

 one-third as wide as the punctures, shining. Scutellum small, oval, very 

 slightly longer than wide, strongly convex. Elytra widest at one-third the 

 length from the base where they are one-third wider than the pronotum ; 

 sides very feebly arcuate ; humeri narrowly rounded ; base transverse and 

 elevated slightly above the pronotum ; disk very convex, from al)Ove not 

 three times as long as the pronotum and nearly two-fifths longer than wide ; 

 striae very feebly impressed, very coarsely t^losely and deeply punctate, more 

 feebly so toward the apices, intervals much wider than the punctures, nearly 

 flat ; inner apical angles slightly rounded. Pygidium exposed, nearly 

 twice as wide as long, broadly rounded beneath, coarsely and very strongly 

 granulose. Fifth ventral segment distinctly longer than the fourth, third 

 fourth and fifth sutures curved backward at the sides successively to a 

 greater degree ; claws very deeply and widely cleft. Anterior femora having 

 a distinct but small tooth beneath at two-thirds the length from the base, 

 remaining femora not toothed ; anterior tibiae obliquely truncate at tij) and 

 armed interiorly with a short acute apical tooth which is slightly recurved. 

 Length 1.6 mm. ; width 0.9 mm. 



Pennsylvania, near Pliiladf'lpliia, 1. 



On eoniparing this specMnien with Dr. LeConte's type of rohi/sfxhis, 

 I had come to tiie conclusion that it was distinct on account of the 

 narrower form and slightly ditferent vestiture, and this opinion is 

 somewiiat strengthened on reading the original description M'herein 

 it is stated that the femora are not toothed, and the second and third 

 joints of the funicle are nearly etjual. It is, however, very closely 

 allied to rohitstiiliis which is (It'scril)e(l from Kansas. The second 

 ventral segment is as long as the third and fourth together, the latter 

 equal in length. 



