March, 1920.] DiCKF.RSOX & W'kISS : EVENING PrIMROSE InSECTS. 59 



Princeton, etc. Early in the season the adult appears to prefer feed- 

 ing in the axils of the leaves, hut later it will he found in addition 

 on the developing flower huds and floUcrs. The larval stage is 

 passed in the developing flower huds. 



Egg. — From dissected female. Length 0.65 mm. Width 0.2 mm. 

 Yellowi.sli white or light with slight yellow tinge; glistening; elon- 

 gate, hroadly rounded at hoth ends, one end slightly narrower than 

 the other. 



Full Grozi'ii Larva. — Lengtli 6 mm. Width 1.9 mm. Typical 

 curculio-shaped form; creamy white; head reddish-hrown, posterior 

 portion of top and sides darker, anterior portion of lahrum and man- 

 dibles brownish hlack ; dorsal surface strongly convex ; ventral sur- 

 face weakly, concave ; head and hody hearing several minute hairs ; 

 body surface minutely shagreened. Young larva more strongly 

 curved than older one and somewhat lighter in color. 



Pupa. — Length 3 mm. Width 2.1 mm. Whitish or creamy white; 

 elytra and wings extend strongly ventrally and posteriorly, the wings 

 extending beyond elytra and approaching each other on the ventral 

 surface. The doubled up femur and tibia of the middle leg extends 

 laterally well over the wing pad and the posterior one extends be- 

 neath and beyond. A pair of well separated and prominent, com- 

 paratively long spine-like iiairs with tuberculate bases is borne be- 

 tween the eyes; anterior to this pair is another pair; anterior margin 

 of prothorax bears a median pair and another pair lateral to it ; me- 

 dian dorsal portion of prothorax bears a transverse row of four 

 hairs; a pair of median separated hairs arises toward posterior mar- 

 gin of prothorax and also a pair lateral to these and closer to the 

 posterior margin ; between these on the posterior margin is a single 

 hair. Each femoral-tibial joint bears a pair of hairs. 



Adult. — AcantJioscelis accphalus. This was described by Say in 

 1824 (Jour. Acad. Nat. Sci. Phil., IV, p. 309; Lee. ed. II, 173) whose 

 original description follows: "Blackish, spotted with cinereous; tho- 

 rax with an impressed line, an obtuse tubercle on each side. 



" Inhabits the United States. 



" Body covered with short robust hairs or scales, brownish-black, 

 spotted and varied with cinereous, imbricate ; head, when at rest, com- 

 pletely retracted within the thorax, somewhat retuse between the eyes; 

 thorax anterior margin abruptly contracted into a collar; posterior 



