Horn.l 



OTrORHYXCULNI. 65 



The form of the only species composing this genus is much that of 

 Ptochus. 



N. adspersus Boh. (PtocJms) Sch. Gen. Cure, ii, p. 48G ; Seidl. Berl. 

 Zeits. 1868. p. 41, (Beiheft) ; iesselatus Boh. loc. cit. p. 487. 



Form oval, robust, densely clothed with pale cinereous scales, with 

 obscure spots near the humeri in some specimens. Head and rostrum 

 longer than the thorax. Rostrum with smooth crescentic space at tip, above 

 slightly transversely concave ; surface sparsely punctured and densely 

 scaly. Thorax transverse, cj'lindrical, sides feebly arcuate, base and apex 

 truncate, surface coarsely punctured and irregular, and moderately densely ' 

 scaly. Elytra broadly oval, convex, three times the length of thorax, 

 striate, striiB with distant punctures, intervals flat, densely scaly, each 

 with a row of very short erect scales. Body beneath and legs densely 

 scaly. Length .14-. 16 inch ; 3.5-4 mm. 



This species from its PtocJms-Yikc form cannot be confounded with any 

 other in the present group, while the Avider metasternal side pieces and the 

 absence of the fixed spurs to the hind tibite, the lateral scrobes and scaly 

 antennae serve to distinguish the genus. Bohemann says the femora have 

 a small tooth, probably from an error of observation, as on p. 487, the 

 tooth is not mentioned in the synonym. 



Appears to be not rare in Florida. 



This insect has been referi'ed to the genus PtocJiushj Seidlitz (loc. supra 

 cit.) an opinion which I cannot adopt, the broad intercoxal process and the 

 free claws appear to me abundantly sufficient to separate it. Species Avith 

 free claws are, however, admitted by Seidlitz in Ptochus. 



Group III. Peritell. 



Antennae long, scape attaining or slightly passing the anterior margin 

 of the thorax ; funicle variable in length, 7-jointed ; club oval. Tarsal 

 claws connate. 



The cotyloid surfaces of the hind tibiaj are entirely open in all the genera 

 of this group, glabrous in six, scaly in the remainder. In the genera in 

 our fauna the rostrum is comparatively or very short, nothing occurs at all 

 approximating the length of that of Peritelus griseus of Europe. The 

 alifi of the rostrum are divergent in but one genus, and then but feebly. 



Our genera are as follows : 

 First abdominal suture straight. Sci'obes lateral. 

 Alaj of rostrum slightly divergent ; first two 



joints of funicle equal PARAPTOCHUS. 



First abdominal suture arcuate. 

 Cotyloid surf\ice of hind tibiaj glabrous. Eyes 

 without orbital groove. 

 Hind coxae open externally ; first abdominal 



~> segment behind them very short , MYLACUS. 



Hind coxae closed externally ; first abdomi- 

 nal segment normal. 



PROC. AMKR. PniLOS. SOC. XV. 96. I 



