AMERICAN COLEOPTERA. 293 



COL.KBriS Erichs. 

 Head short, broad, sliglitly prolonged in front of tlie eyes, clypeus entirely 

 corneous, truncate. Labrurn einarginate, with a basal membranous portion. 

 Mandibles feebly j)roniineut, simple. Last joint of maxillary palpi cylindrical, 

 sliglitly acuminate. Eyes round moderately prominent. Antennte arising from 

 under a slight frontal margin, eleven-jointed, first joint stout, oval, second as 

 long but more slender, third equal to the second but more slender, 4 — 6 short, 

 small, seventh a little larger, eighth small, 9 — 11 forming a loose oblong mass ; 

 head beneath without antennal grooves. Prosternum very short in front of 

 the coxfe, the cavities angulate externally and closed behind. Mesosternum 

 moderately separating the coxse, carinate. Metasternum rather short, the side 

 pieces narrowly visible, posterior coxse contiguous. Abdomen with six seg- 

 ments. Legs rather short, tibiae spinulose externally. Tarsi 5 — 4 — 4 in both 

 sexes. Form broadly oval, not contractile. 



This genus is more closely allied to Anisotonia than to any other. 

 Erichson and the European authorities following him have described 

 the antennae as having a three-jointed club, and while the same idea 

 is followed in the above diagnosis it seems to me that the club should 

 be called five-jointed, as it certainly does not diiFer greatly from that 

 seen in many Liodes. 



One species occurs in our fauna. 



C iinpnnctata Lec.^Broadly oval, convex, pale brown or testaceous, 

 shining. Head very minutely strigose. Thorax more than twice as wide as 

 long, much narrowed in front, apex feebly emarginate, base and sides arcuate, 

 hind angles rectangular but not acutely so, surface smooth without sculpture. 

 Elytra broadly oval, nearly as wide as long, sides continuing the curve of the 

 sides of the thorax, sutural stria imjiressed behind the middle, surface finely 

 transversely strigose. Body beneath nearly smooth. Length .06 — .08 inch; 

 1.5—2 mm. (PI. VI, fig. 23). 



The male is known by the anterior tarsi being slightly dilated, the 

 middle tarsi less so, the posterior femora a little stouter. 



Occurs from the Middle States to Florida, Illinois and Tennessee. 



CYRTUSA Erichs. 

 Head short, scarcely prolonged in front of the eyes, clypeus short, slightly 

 emarginate at middle. Labrum deeply emarginate, subbilobed. Mandibles 

 moderately prominent, dentate at middle of inner edge. Eyes round, feebly 

 prominent. AntenniB arising from under a slight frontal ridge, rather short, 

 eleven-jointed, the eighth however rarely visible, joints 7 — 11 forming a rather 

 abrupt, oblong, flattened club, apparently of four joints from the smallness of 

 the eighth, basal joint of antenna short, stout, second as long or even longer 

 but more slender, third equal to second, 4 — 6 very short, together not longer 

 than the third; head beneath with distinct grooves for the lodgment of the 

 funiculus of the antennae formed by the elevation of the side of the buccal 

 cavity on the inner side, and a distinct ridge extending along the margin of 

 the eye on the outer side. Maxillary palpi short, terminal joint cylindrical. 

 Prosternum in front of coxse very short, the coxal cavities transverse, closed 

 behind, Mesosternum moderately sejiarating the coxae, vertical between them 



