250 Journal New York Entomological Society. [Vol. xxiv. 



is widest about one third the distance from the caudal end. The 

 divisions of the segments are distinct on the ventral side. On the 

 dorsal side the segment are subdivided into smaller lobes, usually two. 

 The last abdominal segment bears a fleshy proleg. The head is 

 rather small and moderately chitinized. The eyes are missing and 

 the antennae are represented by a minute protuberance near the lower 

 end of the frontal sutures. 



The mandibles are not more heavily chitinized than the head 

 except at the tips. These have two blunt teeth and a single seta on 

 the outer margin. The epicranial suture is distinct ; the main arm 

 extends to about the middle of the head, and the two branches extend 

 nearly to the inner angle of the mandibles where they curve inwards. 

 The front is rather small, and bears a pair of setae at its cephalic 

 margin. The epicranium is not separated from the genae by sutures. 

 It bears on each side four setae, one near the main arm of the epi- 

 cranial suture and about the same distance from the point where the 

 suture divides. A second seta laterad and slightly above the first. 

 A third laterad of the branches of the epicranial suture, very close 

 to it and about the middle of the suture. A fourth at the lower 

 angle of the epicranium near the end of the epicranial suture. There 

 are two setae oh the genae, the first is at the side of the head and 

 about half way between the first and third seta of the epicranium. 

 The second is lateral and below the fourth seta of the epicranium. 

 The clypeus is distinctly set off by sutures and is about three times as 

 broad as long. The labrum is distinct and bears a pair of large 

 median setae and a small seta laterad of these. The under side of 

 the labrum is complex. There are five pairs of sense cones and a 

 pair on each of the outer margins. 



Cocoon. — The cocoons (Plate III, fig. 5) are formed very 

 shortly after the larvae enter the ground. Several times I have 

 noticed that larvae, which had fallen from the flower heads, had, on 

 the following morning, formed their cocoons. The cocoons are 

 rather regular and oval and formed of particles of earth joined 

 together by a viscous substance which also lines the cocoon on the 

 inside. They are very hard and retain their shape after the beetles 

 have emerged, which is from 26 to 33 days after the cocoon is formed. 



Pupa. — About eleven days after the larva has formed its cocoon 

 transformation takes place and a creamy white pupa is formed 



