NORTH AMERICAN COLEOPTERA. 155 



median band of cinereous pubescence begins at the lateral margin and extends to 

 the middle line of the elytra, a few cinereous hairs about the apex. Body beneath 

 shining, coarsely but sparsely punctured. Length .18 inch ; 4.5 mm. 



A small species which should be placed near qnadriguttatns 01. {ni- 

 (/rifroiis Say), from which it differs by its more I'obust form, almost 

 smooth surface and the color of the legs. 



One specimen, Kansas. 



PTINID^. 



><iI1^0XYL,0X Duftp. 



S. simjjlex n. sp. — Cylindrical, piceous, elytra brownish. Antennae 10- 

 jointed, pale yellow. Maxillary palpi with last two joints equal. Head opaque, 

 tuberculate. Thorax wider than long, slightly arcuately narrower to the front, 

 hind angles rounded, the anterior declivity roughly asperate, posteriorly densely 

 punctate. Elytra not wider than the thorax, apex gradually declivous, not mar- 

 gined nor dentate, surface very coarsely and closely punctate, the punctures of 

 the declivity being coarser and denser than those near the base of the elytra, su- 

 tural region slightly elevated, more conspicuously in the declivity. Body beneath 

 moderately densely punctate, sparsely pubescent. Length .20 inch; 6.5 mm. 



This species belongs to the first division of the genus as defined 'by' 

 me (Proc. Am. Pliilos. Soc. 1S7S. p. 542) from all the members of 

 which it differs in the simple elytral declivity, excepting dinoderoides, 

 which is much smaller and has the maxillary palpi otherwise formed. 



Occurs in southwestern Texas. 



The species referred by us to Sinoxylon including the one above de- 

 scribed are said to belong to Xylopertha by Mr. Grorham (Biol. Cent. 

 Am. iii, pt. 2, p. 215). I am not now prepared to investigate this ques- 

 tion, and leave the species as they at present stand. Our species of Am- 

 phicerus are referred to Apate. 



S. floritlaiiiisii n. sp. — Cylindrical, piceous, moderately shining, elytra cas- 

 taneous. Antennse pale yellow, ] 0-jointed, the five joints of the female very small. 

 Head closely punctate, subopaque. Thorax broader than long, slightly narrower 

 in front, declivity in front roughly tuberculate and with the tubercles at the front 

 angles slightly hooked, disc at middle closely punctate, posteriorly and at the hind 

 angles quite smooth. Elytra a little narrower than the thorax, moderately coarsely 

 but not closely punctate, declivity flat, on each side tri-tuberculate, the surface 

 coarsely and evenly punctate. Body beneath sparsely punctate and pubescent. 

 Length .12 inch; 3 mm. 



This species is related to and should be associated with texanum and 

 sextuberculatum. In the former the punctures of the declivity are few 

 in number and arranged near the suture, leaving a smooth space near the 

 tubercles. In the second species the declivity is quite smooth and the 

 suture well elevated. In the present species the declivity is very flat and 

 the coarse punctures very evenly disposed over its entire surface. 

 One specimen, Florida. Mr. F. G. Schaupp. 



