April, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 151 



line extending centrally down the elytra. Head and pronotum are 

 finely, closely pubescent with gray hair, that on the head sometimes 

 extending cjuite to the tip of the beak ; prothorax slightly longer than 

 wide, narrower in front than behind, widest in the middle, rounded on 

 the sides and densely finely punctured. There are two longitudinal 

 stripes of brown hairs or rather fine scales, separated in the middle 

 by a narrow gray line ; the sides of the prothorax are covered with 

 dense gray hairs ; elytra yi wider than the prothorax, oval, but with 

 sides nearly parallel, humeri rounded, the stria? are distinctly punc- 

 tured. The elytra have rows of fine gray seta? alternating with hair- 

 like scales (each scale being deeply cleft so that it appears as two 

 hairs) ; there are some fine darker hairs present in such a manner as 

 to present small spots of black. Antennae with first funicle joint much 

 longer than second ; last joint of funiculus separated from club. Legs 

 dark brown with numerous gray hairs present on the femora and tibiae, 

 tarsi more sparsely pubescent ; antennae slightly pubescent. 



After a short time many of the specimens lose considerable pub- 

 escence and appear verj^ dark or even quite black, almost giving the 

 appearance of two species present in the field. The males are slightly 

 narrower than the females in proportion to their size. 



All stages of the larva, the cocoons and fully developed beetles, 

 have been found in one field during the latter part of June and 

 throughout July. Larvae not half grown have been taken on Sep- 

 tember 14. These probably were belated larvre that had failed to 

 develop as rapidly as the others, since there is no present evidence of 

 there being more than one brood of the weevil. 



A large percentage of the weevils soon begin to migrate, moving in 

 almost every direction from the field. I have been told that in the 

 late fall, on very warm days, they have been seen flying, but so far 

 I have been unable to get one to fly, nor have I seen any on the wing. 

 They are strong walkers, untiring and steady. I have found them 

 scattered all across a forty-acre piece of imcultivated land, moving 

 away from the alfalfa field on one side and many of them eventually 

 reaching an uninf ested field on the opposite side of the ' ' forty. ' ' Oth- 

 ers fall into the irrigating ditches and are swept onward, and at times 

 into a field, where they may secure lodgment on leaves or the stems of 

 the plants. Once they obtain solid footing on they go until they reach 

 a field where food plants are present or until night drives them to shel- 

 ter. The weevils are quite susceptible to warmth. Even the passing 

 of the sun behind a cloud will drive them to shelter. They go into 

 hibernation early in the fall, rarely coming out and feeding until 



