532 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



a turned-down portion of the leaf. It weaves its cocoon, which is 

 reddish brown, during the latter part of the month. 



Larva. — The larva is dirty greenish, with four black dots on the head and four on 

 the dorsum of the second segment. (Clemens.) 



The following insects also occur on this tree: 

 Order Lepidoptera. ' 



3. Telea polyphemus (Cram.). 



4. Platysamia cecropia (Linn.). 



Order Coleoptera. 



5. Galeruca vittata (Fabr). Squash beetle. Maine in April and May. 



INSECTS AFFECTING THE WILD THORN. 



Cratwgus tomentosa, etc. 



AFFECTING THE LEAVES. 

 1. Catocala cratwgi Saunders. 



The caterpillar occur in Canada on the thorn in June. 



Larva. — Head flat, medium sized, slighty hairy, grayish, with a few blackish streaks 

 and dots ; bilobed, each lobe tipped with reddish, mixed with white ; these colors m.tr- 

 gined before and behind with blackish brown, in which are dots of a paler hue ; sides 

 of head pale greenish white, with a faint net-work of brownish lines. Body above 

 greenish ash color, with many minute dots of brownish black, some of them forming 

 indistinct and imperfect lateral streaks; dorsal line very slightly paler than the gen- 

 eral color. Second and terminal segments with a number of small whitish dots, each 

 emitting a single hair. On each side of the dorsal line is a row of small tubercles, 

 those on the third segment whitish tipped with black, on fourth reddish tipped with 

 dull white ; on the remaining segments they are a little larger and decidedly red 

 tipped with whitish. Between each of these, and running in the same direction, is a 

 small whitish dot or minute tubercle; each and all of these tubercles emit a single 

 brownish hair. The upper portion of the ninth segment is raised, and on its center 

 there arises a thick, fleshy horn about one-tenth of an inch long, slightly curved back- 

 wards, of a dull dark reddish color, thickly dotted with black about the base. The 

 usual dark patch on ninth and tenth segments is wanting, except close to the under 

 surface, where it is faintly visible. Twefth segment scarcely raised, with no black 

 streak behind, but having a faint line formed by a row of black dots extending ob- 

 liquely down the sides towards the front. Terminal segment flattened ; lateral fringe 

 of a decided rosy pink hue ; spiracles whitish, encircled with black. Body beneath 

 whitish-green, with a tinge of blue ; a central row of brownish-black spots larger 

 and deeper in color on seventh and eighth segments, decidedly paler on second, third, 

 and fourth, and of a reddish-brown on segments from ninth to thirteenth inclusive. 

 Feet pale greenish, faintly marked with brown ; prolegs bluish green, hinder three 

 pairs streaked and dotted with black. 



Occasionally specimens not full-grown have been met with of a darker shade arising 

 from their being more thickly dotted with black ; in these the tubercles have been 

 less decidedly red, while the fleshy horn approached the general color, but was 

 thickly covered with blackish dots. Length about 1^ inches (Saunders). 



