FRANK E. BLAISDELL, SR. 317 



Shape and degree of constriction of the prosternal process is of 

 no value. This process is rather more constricted between the 

 coxae in Coelus ciliatus than in Coelus globosus but variable in form 

 in the same species or race. 



Pronotal punctuation is of value, but the large impunctate 

 areas are not fixed and vary beyond all usefulness and simply in- 

 dicate degree of variation. For instance in certain specimens of 

 Coelus (/rossMs they are large and unmistakable, but in a series these 

 areas become evanescent and pass into the regularity of punctua- 

 tion observed in saginatus. Frequently large impunctate areas 

 will disappear entirely after immersion in chloroform; a part of 

 the technique in the preparation of specimens for study has been a 

 routine bath in chloroform. 



Casey has given the general characteristics of the genus as 

 follows: ''Body oval to oblong-oval, always strongly convex in' 

 form, with a dense fringe of erect fulvous seti3e along the sides and 

 with bristling hairs of the same nature on the legs, along the an- 

 terior margin of the pronotum and on the head behind the suture, 

 but otherwise subglabrous. " 



The head is sinuate anteriorly with a deeply impressed trans- 

 verse suture, which becomes a valuable aid in the division of the 

 forms into groups, when taken in relation to the epistoma and 

 frons. The sides of the epistoma project laterall}^ far beyond the 

 eyes, which are basal and more or less concealed by the pronotum. 



The pronotum is transverse, narrowed to apex which is deeply 

 sinuate, its base truncate with a fine coriaceous margin and the 

 hind angles are not at all produced posteriorly. The scutellum 

 is sinuate and triangular, or occasionally obsolete, much depend- 

 ing upon whether the pronotum is flexed or extended. 



''The elytra are rounded, feebly embracing the sides of the 

 body beneath. Epipleura narrow, gradually wider and more or 

 less concave basally." 



Casey also states that the legs are short and stout, all the tibiae 

 subequally dilated externally at tip, the terminal spurs long and 

 hollowed or flattened on their under surface. The tarsi are very 

 slender, moderately long, with tlu^ joinis swollen distally and 

 Inniring each a terminal corona of stiff fulvous setae; the hind coxa 

 narrowly separated as in Co7iiontis. 



TRANS. AM. ENT. SOC, XLV. 



