ELM-LEAF BEETLES. 237 
The beetle. — (Fig. 81 c, natural size ; Jc y magnified). Resembles somewhat in appear- 
ance the well-known striped cucumber-beetle (Diabrotica vittata), but is at ouce dis- 
tinguished by the elytra not being striate punctate, but simply rugose, the sculpture 
under a high magnifying power being represented in Fig. 81 1. The color of the upper 
side is pale yellow or yellowish-brown, with the following parts black : on the head a 
frontal (often wanting) and a vertical spot ; three spots on the thorax ; on the elytra a 
narrow stripe along the suture, a short, often indistinct scutellar stria each side, and a 
wider humeral stripe not reaching the tip. Under side black, pro- and meso-sternum 
and legs yellow ; femora with a black apical spot. Upper and under side covered with 
very fine, short, silky hairs. In newly-hatched individuals the black markings have 
a greenish tint; the humeral stripe varies in extent. (Riley). 
18. The elm galeruca. 
Galeruca calmariensis (Linnaeus). 
Order Coleoptera ; Family Chrysomelid^e. 
Thick, cylindrical, blackish, six- footed grubs, often 
wholly defoliating the trees, and changing into an ob- 
long oval beetle a quarter of an inch long, of a grayish 
yellow color, with three small black spots on the pro- 
thorax, a broad black stripe on the outer edge of its wing- T 
covers, and a small oblong spot near their base. (Fitch.) 
This insect has been observed by Eiley to be 
extremely abundant on the elm at Washington, 
D. 0. I have observed it commonly at Bruns- 
wick, Me. Fig. 82. — Galeruca calmariensis. 
Smith del. 
19. Haltica (Graptodera) chalybea (Illiger). 
Order Coleopteka; Family Chrysomelhxe. 
Occasionally eating holes in the leaves ; a steel-blue flea beetle, varying much in 
color ; the body oblong, oval, and the hinder part of the thorax marked with a trans- 
verse furrow ; a little over .15 inch (4 mm ) in length. 
20. The ladder chrysomela. 
Chrysomela scalaris (Le Conte). 
Order Coleoptera ; Family Chrysomelid^e. 
Feeding on the leaves throughout the season, a shining, hemispherical, bottle-green 
beetle, with silvery- white wing-covers, on which are several bottle-green spots, and 
a broad jagged stripe on their suture ; its wings rose-red and its antennae and legs 
rusty yellow. Length, 0.30 to 0.40. More common on willows, and especially the 
alder. The larva is thick and fleshy, with a row of black spiracles along the side of 
the body and a dark prothoracic shield. 
21. The American cimbex saw-fly. 
Cimbex americana (Leach). 
Order Hymenopteka ; Family Tenthredinid^e. 
A cylindrical, glaucous, yellowish-white worm, coiled and marked like a snail's 
shell, having a broad black line along the back ; when disturbed ejecting a watery 
fluid from pores situated above the spiracles ; transforming into the largest species of 
saw-fly we have, with stoutly-knobbed antennae; appearing early in summer; also 
feeds on the birch, linden, and willow. (See willow insects.) 
