Apr. I. iQis Laspeyresia Molesta 67 



middle ; incision of dorsal hind margin about one-fourth the width of the head ; distance 

 between dorsal extremities of hind margin less than one-half the width of the head. 

 Frons (Fr) only slightly longer than wide, reaching to middle of head; adfrontal 

 ridges (AdfR) sinuate; longitudinal ridge half the length of the frons; adfrontal suture 

 (AdfS) reaching to dorsal incision of hind margin. Projection of dorsal margin over 

 ventral slightly less than one-third the diameter of the head. 



Ocelli six, in the normal tortricid arrangement; III, IV, and V in a straight line; 

 I larger than the others. 



Epistoma with the normal setae (Ei, E2). 



Frontal punctures (F^) lying rather closely together, anterior to the setae (Fj); 

 distance between punctures less than from puncture (F"^) to seta (Fj); adfrontal seta 

 (Adfj) nearer to Fj than to Adfg; adfrontal puncture (Adf'') approximate to Adfj. 



Epicranium with the normal number of primary setae and six punctures, and with 

 three small ultraposterior setae and one ultraposterior puncture. Anterior and 

 lateral setae (Aj, Aj, A3, and LJ in a line, with distances between Ai and Aj, A2 and 

 A3, and A3 and Li about equal; puncture (A^) postero-dorsad of A2; Aj, Aj, and Ag 

 on a level respectively with F", Fj and Adfj. Posterior setae (Pj and Po) and ptmc- 

 tures (P^ and P'') at middle of head; Pj on a level with adfrontafl puncture (Adf*); 

 P2 and puncture (P'') on a level with beginning of longitudinal ridge (LR); P,, Pj, 

 and adfrontal seta (Adfj) in a line; puncttu-e (P^) approximate to and equidistantfrom 

 A3 and Lj. Lateral seta (Li) on a line with Pj and adfrontal puncture (Adf"); lateral 

 puncture (L*) directly posterior to the seta. Ocellar setae (Oj, O2, O3) well separated. 

 Oi closely approximate to and equidistant from ocelli II and III, within the area 

 bounded by the ocelli; O2 closely approximate to and postero-ventrad of ocellus I; 

 O3 postero-ventrad of and remote from O2, slightly below the level of ocellus VI; 

 pimcture O^ absent. Subocellar setae (Soj, S02, S03) triangularly placed. S02 and 

 S03 closer together than S02 and Soj; pxmcture (So") lying midway between S02 and 

 S03. Genal seta (Gj) and pimcture (G") both present; puncture anterior to the seta. 



Length of full-grown larva 11 to 13 mm. 



When the young larva hatches it immediately starts on its search 

 for a favorable feeding place. In one instance 20 minutes were re- 

 quired after hatching for a larva to explore three peach leaves and to 

 make its way to the tender growth at the terminal, where it bored into 

 the interior of the peach shoot. The larvae do not feed as they enter, 

 but withdraw their heads from the burrow and cast aside the fragments 

 of tissue until the more succulent interior of the twig is reached. If 

 the young larvae fail to locate favorable feeding places in a short time 

 they undoubtedly die, for in the rearing jars they die within 12 hours 

 after hatching. 



The length of time required for larvae to develop fully varies consid- 

 erably, the feeding period being from 8 to 16 days in length throughout 

 the entire season and the average for 59 larvae being 11.2 days. When 

 the larva has fully developed it leaves the twig or fruit where it has 

 been working and starts in search of a favorable place for spinning its 

 cocoon. The spring and midsummer cocoons are formed mostly in the 

 axils between twigs or on the fruit at the point where it is attached to 

 the stem. The latter place is the one most often chosen. Occasionally a 

 larva vdll spin on the open surface of the peach, but usually it selects a 

 more sheltered spot. The cocoon is made of fine silken strands, the 



