320 COLEOPTEBA OF NORTH AMERICA. 



ivory bands. The episterna of the metathorax are narrow, and 

 the epimera are scarcely produced over the angles of the 1st ven- 

 tral ; the intercoxal process is acute. The legs are moderate in 

 length, and the thighs somewhat strongly clubbed, and not spi- 

 nose at tip ; the 1st joint of the hind tarsi is less elongated than 

 in the other groups. The mesonotura is not punctured at the 

 sides, and is covered with very fine stridulating lines. 



In some of the genera the middle coxal cavities are nearly or 

 entirely closed externally, but as in other portions of the series, the 

 transition is accomplished by such slight gradations that the 

 character seems to have little value. 



2d joint of antennae equal to 4th ; 



Antennae not spinose, elytra without ivory spots. MICROCLYTUS. 



2d joint of antennae short, 3d longer than 4th; 

 Elytra without ivory spots ; 



Eyes oblique, emarginate. CYRTOPHORCS. 



Eyes entire, rounded. TILLOMORPHA. 



Elytra with a transverse ivory band. EUDERCES. 



Microclytus is founded upon C. gazellula Hald. a species of 

 the Middle States, having entirely the form and coloration of the 

 European Anaglyptus mysticus, but smaller, and differing essen- 

 tially by the 2d joint of the antenna? being fully half as long as the 

 3d, and scarcely shorter than the 4th joint ; the flying hairs are 

 peculiarly long and numerous ; the eyes are oblique, emarginate 

 above, and pointed behind, as if the usual deeply emarginated 

 form had been shortened by the obliteration of the upper part. 

 The same form is seen in Cyrtophorus verrucosus, but less acute 

 at the upper angle. In Tillomorpha geminata (Hald.) the eyes 

 are oval, not at all emarginate, the upper part being absent ; and 

 in Euderces they are entirely divided, the lower part being emar- 

 ginate, acutely pointed above, and the upper part small, distant, 

 and oval.* 



* Lacordaire, Gen. Col. ix, 89, observes that this character, mentioned 

 by me in the original description of the genus, has completely escaped 

 him ; it is quite obvious in all the specimens before me, though in Eu. 

 picipes the two parts of the eye are connected, as in Tetropium, by a line 

 of corneous material, without lenses ; even this line is wanting in Eu. 

 pini, so that the eye becomes as completely divided as in Tetraopes. 



