126 Journal New York Entomological Society, t^'o'- xxix. 



nels. When digging around the stem and roots for larv?e, it is 

 usually possible to find some in the soil before the main root 

 is uncovered. Therefore, some larv?e eat into the root from the 

 outside, while others burrow to a certain extent at least a part of 

 their time in the root itself. Mr. Craighead informs us that gal- 

 leries are found extending from root to root through the earth, 

 then continuing up to near the surface of the ground where pupa- 

 lion occurs. 



Devereaux (Can. Ent., Vol. X, p. 143. 1878) states that while he 

 was plowing through a patch of Asclcpias cornuti, during the early 

 part of June, 1876, he observed numerous cerambycidian larvae in 

 the bottom of the furrow, stirring about in the soil. Two of them 

 were put in a glass jar with a milkweed plant. The larvae soon 

 came to the surface, pupated and adults of T. tctraophthaUnns 

 emerged later. Mr. Craighead is of the opinion that the larval 

 period extends through two years as pupx, and young larvae can be 

 found in the early summer. 



Egg. Length, 1.85 mm. Width, 0.42 mm. Pearly white, compara- 

 tively smooth; elongate, rounded at both ends, sides almost parallel, 

 tapering slightly to posterior end. 



Full Grown Larva. The following description was kindly sup- 

 plied by Mr. F. C. Craighead from a paper of his now in press. A 

 description of the pupa will also appear in a future paper by the 

 same author. " Form robust, fleshy, cylindrical or slightly tapering 

 posteriorly; texture very finely wrinkled, shining, densely clothed 

 with long whitish lemon-colored hairs. 



'' Head rather thick but depressed, sides narrowing posteriorly, 

 suddenly constricted about middle, widest across posterior limit of 

 front; epistoma thick, rugulose ; clypeus and labrum thick, latter 

 transverse, roundly semi-circular from base, densely haired; mandible 

 from side about two times the basal width, outer face rather rugulose, 

 cutting edge obliquely truncate, molar tooth distinct ; antennal cavity 

 bisected by frontal suture; ocelli not distinct; ventral mouth parts 

 fleshy, thick; mentum distinct, transverse; maxillary palpi two- 

 jointed, last joint slender, shorter than the basal, equal to the last 

 labial ; hypostoma transversely bulging, finely wrinkled ; gula less 

 corneous. 



