THE CANADIAN ENTOMOLOGIST. 



THE COLEOPTERA OF CANADA. 



BV H. I'. WICK-HAM, IOWA CITY, IOWA. 



XIX. The Chrysomelid.I': of Ontario and Quebec — (Continued). 



Trihe IX. — Galerucini. 



This tribes includes a number of species which are, as a rule, easily 

 distinguished by the peculiar appearance given by their soft integuments 

 and usually somewhat elongate form. A number of them are pubescent, 

 while others, on account of the peculiar sculpture of the surface, are quite 

 opaque, the effect on the eye being, at first glance, the same in each case. 

 The elytra in our species are longer than the abdomen, the prothorax is 

 margined, the antennju approximate, inserted on the front, the hind legs 

 with rather slender thighs, not fitted for leaping. It will be remembered 

 in this connection that I consider the Halticini as a distinct tribe. 



Many of the Galerucini are extremely injurious, the striped cucum- 

 ber beetle being well known and dreaded by gardeners ; its congener, 

 Diabrotica longicornis, which has lately been found by Mr. Harrington 

 in the Eastern Provinces, is a notorious pest to corn in the United States. 

 In the Northeastern States the imported elm-leaf beetle, Galerucella 

 s^anthomelcena, Schr., is doing much mischief, but I cannot find that it is 

 reported from Canada. If found, it may be distinguished from all our 

 other species of Galerucella by the colour of the antennae, which are 

 piceous above and pale beneath, while the elytra are comparatively finely 

 and equally punctate. It is yellowish above, the head with one dark 

 spot, the thorax with three, the elytra with a short inner stripe (sometimes 

 wanting), and a long one from the humerus ; legs pale, each femur with a 

 small dark spot. 



The tribe has recently been worked up in an excellent paper by Dr. 

 Horn, and this has been closely followed and freely used in the prepa- 

 ration of the following pages. In order to avoid the constant repetition of 

 quotation marks and statements of acknowledgments, it is well to say that 

 the differential characters brought out are in almost every case those used 

 by the Doctor, and that while I have not scrupled to change the arrange- 

 ment of his tables where it seemed to me more likely to serve the pur- 

 pose of the present article, I have, on the other hand, found it impos- 

 sible to imi)rove on most of his expressions, and have therefore used 

 them entire. With this acknowledgment of the source of whatever is 

 good in the paper, we may proceed to separate the genera occurring in 

 Canada, thus : — 



