174 Mr. J. S. Baly on the differential characters 



means of diagnosis) varies greatly in form in the present 

 family, and often affords most important aid in the separa- 

 tion of allied species. I will only add, that I have included 

 in this paper the descriptions of some Chrysomelidce con- 

 tained in my cabinet, apparently new to science. 



Synoptical Table of tlie Sjjecies belonging to Suffrian's llth grovj), 

 described or mentioned in this lyaper. 



I. Apical joint of maxillary palpus broadly truncate. 



A. Sublatcral groove of thorax interrupted in its middle third, 

 a. Elytra oblong or oblong-ovate; sides parallel 

 in the $, usually dilated posteriorly in 

 the $. 



Males. 



1. Apex of anal segment of abdomen tri- 



lobate, the lobes obtuse, equal in length sj}eciosa. 



2. Apex of anal segment concave-emar- 



ginate, bisinuate, the intermediate lobe 

 shorter than the angles of the emar- 

 gination, — 



* Apical joint of maxillary palpus 



broader than the penultimate . . nivalis. 

 ** Apical joint of maxillary palpus 



narrower than the penultimate. . gloriosa. 



3. Apex of anal segment bisinuate, the 



intermediate lobe produced, angulate. . bifrons. 



Females. 



1. Apex of anal segment of abdomen bi- 



sinuate, trilobate, the intermediate lobe 

 scarcely longer than the lateral ones, 

 obtuse . . . . . . . . . . sjjeciosa. 



2. Apex of anal segment bisinuate, trilo- 



bate, the lateral lobes very short, the 



medial one produced, subangulate . . gloriosa. 



3. Apex of anal segment obtuselj' rounded, 



obsoletely bisinuate . . . . . . nivalis. 



i. Apex of anal segment angulate . . bifrons. 



b. Elytra regularly oval, not dilated behind the 



middle in either sex . . . . . . . . svlcata. 



B. Sublateral groove of thorax entire . . . . intricata. 



follows: — After the removal of the abdomen from the body, which I 

 readily effect by the insertion of a needle into the hinder acetabula 

 (between the coxai and the basal margin of the abdomen), I moisten its 

 under surface with a little M'ater or spirit, and extract the telum with a 

 fine pair of forceps ; having done so, I mount the latter on a strip of card, 

 and, with the aid of gum, refix the former in its original position. 



