394 HENRY SIIIMER, M D. 



1 have made the foregoing descriptions of the several species of Dar- 

 tylosplnxra^ excepting No. 1, quite brief, because of the general simi- 

 larity of the perfect insect ; yet, the difference in the anatomical struc- 

 ture of the galls, the season of their devclnpnient, the different sizes and 

 shades of color of their inhabitants when in the living state — for they all 

 become black and undistinguishable when dry — constitute a sufficient 

 reason for assigning them to different species. That there really is 

 more than one species there is probably no doubt, certainly not with those 

 naturalists who even go so far as to name galls without knowing their 

 legitimate inhabitants. 



During the period of my studies of the Hickory galls, I was the con- 

 stant observer of the various parasites connected with both the gall 

 itself and the inhabitants thereof. The following brief observations 

 T will make : 



Parasites of the gnJIs. — 1st. In many galls I observed an unknown 

 apecies of Thrips, quite abundant, with red bodies, and antennae, legs, 

 and tip of tail black. Length .01 inch. — "^nd. Conotraehefus posficafns, 

 Schlinh., the larva of which lives in the galls, chiefly of No 6, often 

 consuming its entire substance; it is a yellowish-white, slightly hairy, 

 footless worm, with head and collar light brown. They had finished 

 feeding and entered the ground about last of June, and the imagos ap- 

 peared on July 21st. This is probably the same species with Dr. 

 Fitch's 0. ekgans (1st N. Y. lleport, p. 156.) — 3rd. The larva of 

 Anthonomus cri/thrnpus^ Say, was also found within some of the galls; 

 it is a white, rugose, footless, quick-motioned worm about .20 inch in 

 length; it transforms within the gall; the pupa is white, back much 

 curved, tail sharply pointed, and has a number of short reddish bristles 

 about the head and tail; it wriggles about very rapidly when disturbed. 

 4th. Larv£e of the following new species of Gnipho/ifha were found 

 in August and September living in the nut of Carya amara (Bitternut 

 Hickory) ; they destroy the interior of the nut, causing it to fall to the 

 ground; the imago appeared in the latter part of November, it there- 

 fore hibernates in this state and continues to live in the spring until 

 .sometime in June, when the nut is sufficiently developed to receive the 



Grapholitlia caryae, n. sp. 



Palpi whitish except the minute third joint which is blackish. Head ashy 

 grey, scales long, especially on the occiput. Thorax and abdomen blackish ; 

 patagia with a bluish tinge and a few pale scales posteriorly. Anterior wings 

 dark brown, with numerous ferruginous scales, most prominent on and beyond 



