240 



CURCULION^IDJE. 



[LeConte. 



3. Club of antennae annulated 4. 



" of antennae solid EURHOPTUS. 



4. Claws very small, approximate ACALLES. 



larger, divergent MIOROMASTUS. 



5. " slender, divergent PSEUDOMUS. 



6. Tibiae strongly compressed 9. 



" slender, more or less sinuate 7. 



7. Mesosternum deeply emarginate 8. 



feebly " TYLODERMA. 



8. Claws appendiculate, divergent PHYRDENUS. 



" simple, divergent CRYPTORHYNCHUS. 



9. Tibiae not serrate lO. 



" more or less serrate ZASOELIS. 



10. First ventral suture deep CCELOSTERNUS. 



" " " sinuate, faint at the 



middle BAROPSIS. 



ACALLES Sch. 



The very short metasternum, with indistinct episterna, the oval elytra 

 with rounded sides, and the small tarsal claws will enable the species of 

 this genus to be easily recognized. The mesosternum is usually deeply 

 excavated for about one-half its length, so that the pectoral groove ends 

 about the anterior limit of the middle coxae; but this is not the case with^. 

 michalis and pectoralis; the hind part of the mesosternum is protuberant, 

 so as to make an obtuse angle with the metasternum. The distance from 

 the middle to the hind coxte is not greater than from the middle to the front 

 pair; the mesosternum at the side appears longer than the metasternum, a 

 very unusual character in Coleoptera. The last two species described below 

 are anomalous, and when studied in connection with the foreign species, 

 will probably be considered as constituting new genera; in A. nuchalis 

 the metathoracic side pieces are as distinct as in Cryptorhynchus; in A. 

 pectoralis, the mesosternum is scarcely more emarginate than in Tyloderma. 



Mesosternum deeply emarginate 2. 



" broadly " 12. 



2. Scales thick, erect, without intermixed bristles 3. 



" appressed, with bristles intermixed 7. 



3. Elytra with conspicuous pale markings 4. 



' ' not conspicuously marked 5. 



4. Black, with large, posthumeral spot, and band be- 



hind the middle of elytra white 1. nobilis. 



Black, with sub-basal baud and a few spots white. . 2. basalis. 



5. Elytra not tesselated • 6. 



" with brown scales, tesselated with paler 3. porosus. 



6. Interspaces of elytra moderately wide 4. turbidus. 



" " very narrow 5. clathratus. 



