TRANSACTIONS HORTICULTURAL SOCIETY OF NORTHERN ILL. 363 



The perfect insect is about one-half an inch long, and expands about 

 three-fourths of an inch; thorax, ochre yellow; abdomen, bluish black, 

 varied with yellowish ; fore wings with margins and median vein bluish 

 black. 



Whitewashing has been recommended. 



^geria rubi, Riley. Raspberry Root-borer. 



The larvae work in the lower part of the canes of the raspberry and 

 blackberry. 



The larva attains an inch or more in length when fully grown ; is of 

 a pale yellow color, with a dark reddish brown head ; dwells mostly in 

 the root, but burrows in the cane, often several inches above the ground. 



The moth has the front wings bordered with rusty brown, and the 

 body marked with yellow and black — these colors on the abdomen form- 

 ing alternate rings; expanse from one to one-fourth of an inch; it comes 

 out in August and September. 



The only remedy appears to be to dig out, in the spring, the infested 

 roots and burn them. 



Tremex columba. Elm-tree Borer. 



This species belongs to the order Hymenoptera, which contains 

 wasps, bees, etc.; to the family Uroceridse, or "horn -tails," so called 

 on account of the horn at the extremity of the larva, and the borer at the 

 extremity of the female perfect insect. It is wasp-like in appearance, 

 having four thin membranous wings similar to those of a wasp, but differs 

 from the wasp in not having the body constricted at the waist. The 

 body of the female is cylindrical, about as thick as a common lead 

 pencil, and an inch and a half or more in length exclusive of the borer, 

 which is an inch long and projects three-eighths of an inch beyond the 

 end of the body. The latter rounds upwards, like the stem of a boat, 

 and is armed with a point or short horn ; the head and thorax are rust- 

 colored, varied with black ; the abdomen, or hinder and longest part of 

 the body, is black, with seven ochre yellow bands across the back, all of 

 them but the first two interrupted in the middle. The horned tail, and 

 a round spot before it, impressed as if with a seal, are ochre yellow; the 

 antennae are rather short and blunt, rust-colored, with a broad, black 

 wing in the middle ; the wings expand two inches and a quarter or more ; 

 they are smoky brown and semi-transparent ; the legs are ochre yellow, 

 with blackish thighs; the borer, awl or needle, is as thick as a bristle, 

 spear-pointed at the end, and of a black color; it is concealed, when not 

 in use, between two narrow, rust-colored side pieces, forming a kind of 

 scabbard to it. 



The male is extremely unlike the female in color, form and size, and 

 is not furnished with the remarkable borer of the other sex; is rust- 

 colored, variegated with black; antennae rusty yellow or blackish ; wings 

 smoky, but clearer than those of the female, and of a blackish color; the 



