106 OTIORHYNCHID^. 



[Horn. 



covered with cinereous scales, a large discal space fuscous, very broad at 

 the declivitj^ extending anteriorly along the intervals 1-2-3 and at base 4; 

 third interval at base with a cinereous line ; a small fuscous spot at the tip 

 of the fifth interval. Body beneath piceous, shining, sparsely scaly. Legs 

 rufous, femora at middle piceous, sparsely scalj'^ and pilose. Length .20 

 inch ; 5 mm. 



One specimen, Missouri. 



Can this possibly be Polydrosus americanus Gyll. ? (Sell. Gen. Cure, ii, 

 p. 136) . I cannot otherwise identify the species. 



SCYTHROPUS Sch. 



ScytJiropus Sclionh. Cure. Disp. Meth. p. 140. 



Rostrum, short, stout, slightly narrowed in front, angles rounded, de 

 clivous and truncate at tip, with arcuate carina and smooth space. Scrobes 

 short, badly limited and slightly arcuate. Eyes distant from the thorax, 

 round, slightly prominent. Antenna} long, scape long, slender, gradually 

 clavate, slightly arcuate and passing the eyes behind ; funicle 7-jointed, 

 1-2 longer, the first slightly longer than the second, 3-7 shorter, gradually 

 decreasing ; club elongate, oval. Thorax short, cylindrical, slightly 

 narrower in front. Scutellum small, nearly oval. Elytra wider at base 

 than the thorax, feebly emarginate, humeri obtusely prominent. Metas- 

 ternum moderately long. Intercoxal process oval at tip. Second abdomi- 

 nal segment longer than the two following together, first suture arcuate at 

 middle. Articular surfaces of hind tibias terminal. Tarsal claws small, 

 connate at base. Body densely scaly. 



In addition to the above characters it will be seen that the gular notcli is 

 semicircular, the mentum small and rather narrow. The mandibles are 

 short, robust, glabrous, the scar oval, terminal and not prominent. The 

 deciduous pieces are long, moderately stout and falciform. 



Two species occur in our fauna. In one, elegans, the anterior and middle 

 tibise are sinuate within, especially in the (^, the other, calif or nicus, the 

 tibiaj are scarcely perceptibly sinuate. The vestiture also varies and may 

 be thus expressed : 



Body densely covered with scales of variable color 



from brilliant green to cinereous, suture always, 



sides usually of paler color elegans. 



Body less densely covered with piliform scales, 



brownish or ferruginous, region of the suture mar- 



inorate with white californicus. 



S. elegans Couper. {Polydrosus) Canadian Naturalist, 1865, p. 63. 



Form oblong, densely scaly. Head and rostrum as long as the thorax, 

 surface densely scaly except at tip. Thorax wider than long, apex and 

 base truncate, a slight constriction at the sides behind the apical margin, 

 sides moderately arcuate, disc moderately convex, surface densely scaly. 

 Elytra oblong, gradually broader behind the humeri, narrowed at apical 



