

The B ology of Maine Species of Altica. 157 



DESCRIPTION OF THE EGG. 



Subcylindrical, irregularly elliptical ; surface minutely punctate and 

 finely sculptured, entirely divided into polygonal areas, though the sculp- 

 turing is frequently obscure ; color varying from yellow to dull orange ; 

 length about 1 mm. The eggs are shown in figure 12A. 



DESCRIPTION OF THE LARVA. 



The numbering of the tubercles. The only important paper 

 with which the writer is familiar that deals with the numbering 

 of the tubercles in chrysomelid larvae is that of Sanderson 

 (1503. Notes upon the structure and classification of chrysome- 

 lid larvae. Proc. Ent. Soc. Wash. v. 5:21-30). While the writer 

 is unable to accept all of the conclusions reached in this paper, 

 especially in the homologizing of the thoracic tubercles ( because 

 Sanderson's paper takes no account of the individual setae), 

 he hesitates to propose a new system which he recognizes as 

 merely a tentative one. But since in each case he has made two 

 drawings, one showing the actual setal arrangement in the lar- 

 vae and the accompanying one the numbering of the tubercles 

 used in this bulletin, but little confusion should result, especially 

 as immediately below is appended a cross-reference table show- 

 ing the corresponding tubercles when numbered according to 

 Sanderson's scheme, and according to the writer's. No one 

 recognizes more plainly than the writer the unsatisfactory points 

 of both schemes, and that both must be displaced when the group 

 as a w r hole has been carefully studied. 



Sanderson. Woods. 



Prothorax. 



i-vi i-viii 



vii-viii x 



ix xi 



x xii 



xiii-xiv xiii-xiv 



Mesothorax and Metathorax. 



i, ii, iii i, ii, iii 



iv '.: iv-vi 



v-vi v-vii-viii 



vii :.-.. .... ...... :.. : ix 



