KEY TO GENERA OF OTIORHYNCHIN^B. 137 



oo. Antennae shining, sparsely hairy; body beneath nearly naked. 



t. Claws free. BARYNOTUS, p. 101. 



tt. Claws connate. BARYPEITHES, p. 132. 



//. Scrobes variable, never at the same time linear and directed beneath. 



( BRACH YBHINIX^E, Pierce ) . 



u. Elytra scarcely surpassing width of thorax at base, humeral an- 

 gles rounded. 

 v. Tarsal claws free. 



w. Corbels of posterior tibiae cavernous. AGRAPHUS, p. 109. 



ww. Corbels of posterior tibiae open. 



x. Antennae more or less long and slender; outer joints of fun- 



icle long. 

 y. Hind tibiae with two short fixed spurs. 



OTIORHYNCHUS, p. 110. 



yy. Hind tibiae without terminal spur. NEOPTOCHUS, p. 112. 

 xx. Antennae at least moderately robust, outer joints of funicle 



short or rnoniliform. 



z. Metathoracic side pieces entirely concealed; eyes with 

 distinct orbital groove. 



1. Scrobes superior, very short and deep, not reaching the 



eyes; anterior and middle tibiae feebly mucronate. 



CERCOPEUS, p. 113. 



2. Scrobes lateral, long, passing directly backward and in- 



closing the eyes; tibiae strongly mucronate. 



CH.ETECHUS, p. 113. 



zz. Metathoracic side pieces visible, suture at least moderately 

 distinct; scrobes lateral, deep, moderately arcuate and 

 passing directly backward to the eye. 



TRACK YPHLCE as, p. 114. 

 vv. Tarsal claws connate. 



3. Side pieces of mesosternum very unequal. GEODERCES, p. 115. 

 .}. Side pieces diagonally divided and nearly equal; elytral oval, 

 humeri rounded. APHRASTUS, p. 126. 



uu. Elytra wider than thorax at base. 



5. Claws free. BRACHYSTYLUS, p. 122. 



6. Claws connate. PIIYLLOBIUS, p. 129. 



Subfamily X. CURCULIONIN/E. 



To this subfamily belong the great majority of all our Curcu- 

 lionidse. From the nine subfamilies which precede they are sep- 

 arated mainly by the negative quality of not possessing the pecu- 

 liar characters of each as set forth in the key, p. 47. The large 

 number of species and consequently the great variations in the 

 principal structures used in classification, have made very diffi- 

 cult the preparation of a table which will represent in lineal ar- 

 rangement the proper relationships of the tribes composing the 

 subfamily. In the key which follows we have first excluded ( a > 

 the species with beak curled under the head and thorax (Tribes 



