104 Journal New York Entomological Society. [Voi.vin. 



Antennae variable, the club loosely 3-jointed, the fovece small, more widely separated 

 on the front and superficial ; eyes somewhat less coarsely faceted ; basal seg- 

 ments of the abdomen relatively rather shorter and generally with a short and 

 broadly arcuate post-coxal plate, the sutures straight throughout ; prosternum 

 broader and less prominent, the acute lateral margins not extending to the an- 

 terior margin ; tibire slender, the scutellum very small ; anterior coxae transverse, 

 the intermediate very widely separated ; body broadly oval, convex and generally 

 glabrous EPH iste.m ixi 



The Sternodeini are peculiar to the pala^arctic provinces, but the 

 other tribes are well represented in America, the Ephistemini, however, 

 by no means so extensively as in Europe. 



C.tNOSCELINI. 



This tribe is composed at present of the single genus Cccnoscelis, 

 which is very well developed in the northern parts of America, and, 

 to a less degree, apparently, in the pah^earctic region ; its species are 

 the largest and most conspicuous of the subfamily, and compare very 

 closely in this respect with CryptopJiagus, but the body is narrower and 

 more elongate as a rule. 



Casnoscelis T/io/ns. 



This is one of the best defined and more isolated genera of the family, 

 distinguished by the elongate, strongly punctured and pubescent body, 

 with double lateral margin and broadly impressed basal parts of the 

 pronotum, convex, coarsely faceted and sparsely setulose eyes and well 

 developed stout antennce, with the basal joint unusually large and ob- 

 conical, the second and third diminishing in size and four to eight 

 still narrower and alternately shorter and longer, as usual in the Ato- 

 mariinai ; the basal joint of the club is small, the last two well devel- 

 oped. The tarsi are very slender and the posterior are 5 -jointed in 

 the female and 4-jointed in the male, there being otherwise but lit- 

 tle sexual disparity; the male is usually rather narrower, with relatively 

 larger, and occasionally somewhat less transverse, j)rothorax. Thepros- 

 ternal process is narrower, the tip prolonged, free, concave toward tip 

 and acurninate, the mesosternum being appreciably concave. The 

 abdominal sutures differ greatly from the usual type and are strongly 

 reflexed for a short distance at the sides, especially posteriorly. The 

 American species appear to be far more numerous than the European 

 as described thus far, and those before me may be outlined as fol- 

 lows : — 



