250 
HALF HOURS WITH mSEOTS. [Packard. 
another species (Fig. 192, Saperda calcarata; b, upper and 
c, under side of the head, enlarged), one of our finest long¬ 
horned beetles. 
Among other beetles found on the leaves of the elm are 
the European Calmar leaf beetle (Galeruca calmariensis). 
It is about the size of the common striped squash beetle, 
but grayish j’ellow, with three black spots on the thorax and 
a broad black stripe on the outer edge of the wing covers, 
with a small oblong spot near their base. Then there is the 
common Prussian blue fiea beetle {Haltica chalybea, Fig. 
Fig. 191. 
Linden Tree Borer and Beetle. 
193), often occurring in great numbers on the leaves, and 
the Cotalpa beetle (see Fig. 21), which sometimes steals a 
few leaves. 
The maples are unusually free from noxious insects. 
Young saplings are sometimes cut down in their prime by 
certain Buprestid borers, and the trunks are often riddled 
with the large holes made by the Tremex or horn-tail. This 
fine saw-fiy may be found in maples, as well as elms and 
other trees, in all stages of growth in the autumn, the large, 
soft, white, fully grown larvae, whose bodies terminate in a 
horny hook, occurring with the pupae and the fiies them- 
26 
