THE CLOVER-ROOT CURCULIO. 



35 



THE EGG. 



Fig. 16. — -The clover-root curculio : a, 

 Egg, immediately after oviposition ; 6, 

 egg, one day after oviposition. Greatly 

 enlarged. (Original.) 



The egg (fig. 16), as observed by Mr. J. A. Hyslop, is very slightly 

 ellipsoidal, almost spherical, and slightly granular, measuring 0.36 

 mm. in diameter; white when first deposited (fig. 16, a), but turning- 

 jet-black after twenty-four hours 

 (fig. 16, b.) 



THE LARVA. 



The newly hatched larva is 0.68 



mm. in length by 0.18 mm. in 



breadth and white. The head is 



light chocolate, the posterior emar- 



ginate portion very light, and the 



sides darker. The head is very 



prominent, and cordate, 0.16 mm. 



in length by 0.19 mm. in breadth, 



the posterior portion deeply emar- 



ginate. The abdomen bears black 



hairs averaging 0.17 mm. in length. 

 The full-grown larva (fig. 17) is 



5 mm. in length and 1.3 mm. in breadth. It is white, with a tinge 



of yellow. The head is light chocolate, 1 mm. in length by 0.85 mm. 

 in breadth. When found in a natural condi- 

 tion the fresh specimen has a purplish tinge, 

 apparently due to the contents of the alimentary 

 canal. 



THE PUPA. 



The pupa (fig. 18) is 4 mm. 



in length, almost white, with a 



slight tinge of yellow on the 



dorsal abdominal area. Each 



segment of the abdomen bears 



a row of dark hairs and pos- 

 teriorly at each side of the 



terminal segment are two very 



prominent, dark spines, with 



a secondary spine on the out- 

 side of each. On the fourth day after pupation the eyes turn 

 reddish brown and on the ninth day the mandibles become the 

 same color. 



85 



Fig. 17. — The clover- 

 root curculio : Larva. 

 Greatly enlarged. 

 (Original.) 



Fig. 18. — The clover- 

 root curculio: 

 Pupa. Greatly en- 

 larged. (Original.) 



