280 THE ENTOMOLOGIST. 



a. Oral organs normal. Club of 



anteunse annulated ; third 



joiut of tarsi bilobed. 

 Mesothoracic epimera not ascending. 

 Mesothoracic epimera ascending. 



h. Oral organs abnormal ; first joint 



of autennal club usually very 



large, corneous ; third joint 



of tarsi rarely bilobed. 

 Pygidium exposed. 

 Pygidium covered by elytra. 



Each of these divisions contains several tribes differentiated 

 by characters of smaller importance, and not unfrequently 

 indefinite. 



III. The next attempt at a general classification was made 

 by Mr. H. Jekel.* This excellent author recognized with 

 great clearness, and defined with tolerable precision, the 

 following eight principal types among the Rhynchophora: — 

 Bruchides, Anthribides, Attelabides, Curculionides, Calan- 

 diides, Cossonides, Scolytides, and Brenthides. The last- 

 cited memoir is occupied chiefly with a further development 

 of the classification of the largest of these, the Curculionides 

 proper ; and in it he proceeds to separate, as sub-families, f — 

 Brachycerides, Brysopides, and Amycterides : epigeal forms, 

 in which the tarsi are not dilated, and not furnished with 

 brush-like hairs beneath. Having thus isolated them, the 

 great mass remaining is divided into — 



Body dissimilar in form, male and female ; narrower 



in male. - - . - . Platygnes, 



Beak similar in both sexes. - - - Homorhines. 



Beak dissimilar. .... Heterorhines. 



Body nearly or quite of the same form, male and 

 female. 

 Pygidium covered by the elytra ; body pollinose 



or pubescent. ... - Isostnes. 



Pygidium exposed or covered; body squa- 



mose, &c. .... Metriogynes. 



* Annales Ent. Soc. France, 1864, p. 537; Ins. Saundersiana, 155 sqq., 



1860. 



+ Mr. Jekel gives to the anomalous groiips this subordinate position, 

 rather, as he says, " Pour ne pas heurter les idees generalement admises," 

 than in accordance with his own views, which would lead him to regard them 

 as I have done, — as genuine families. 



