182 The Biology of Maine Species of Altica. 



(iii) Refused. 



Corn, cultivated willow, heart-leaved willow, gray birch, 

 alder, red oak, white elm, smooth gooseberry, European 

 gooseberry, red currant, cultivated spiraea, app'e, moun- 

 tain ash, shad bush, choke cherry, red cherry, wild plum, 

 bean, maple, wood-bine, basswood, evening primrose, red 

 osier dogwood, low blueberry, tomato. 



Natural Enemies. 



Fungous diseases. This species is susceptible to the same 

 fungous diseases as the dogwood flea-beetle (see page 173). 



Insect enemies. The writer has not yet found any parasitic 

 or predaceous insects preying upon this species. 



Control. 

 Same "as for the dogwood flea-beetle (see page 173). 



ALTICA ULMI, SP. N., THE ELM FLEA-BEETLE. 



Technical Description of the Stages. 



description of the adult. 



Elongate oval, distinctly convex; body above shining green, blue, 

 violet, or red violet with greenish or purplish reflections ; antennae black 

 with purplish or greenish reflections, especially the proximal segment: 

 proximal segment quite smooth, the others more or less pubescent with 

 fine white setae : about one-half the length of the body and somewhat 

 less than twice the width of the prothorax at its base : segments 2-3-4 

 successively longer : segment 4 nearly if not quite three times as long 

 as wide : segment 10 not more than twice as long as wide, frequently 

 less ; eyes black, not prominent, their width as seen from the front less 

 than one-half the interocular distance ; frontal carina moderate, obtuse ; 

 frontal tubercles moderately large, flat, almost contiguous ; vertex not 

 punctate; width of head across the eyes about two-thirds that of the 

 prothorax at its widest point. 



*For the scientific names of the plants used in these tests, see 

 page 171. 



