123 
Eleven females, one collected at Brockport, N. Y., the others bred 
from larva^ found on pear trees near Sacramento, Cal., the adults issu- 
ing in March. (Coll. U. S. Nat, Mus.) 
This sawfly was reported by Matthew Cooke to be very injurious in 
1881-82 about Sacramento, Cal., and in adjoining counties. It feeds on 
the leaves of pear trees, skeletonizing them more or less, somewhat after 
the manner of the common cherry and pear slug. It forms little brown 
cocoons about the base of the tree, in which the larvae hibernate, the 
adults issuing early in March. A second brood, apparently, was obtained 
in the latter part of April, indicating the probable occurrence of several 
annual broods. Mr. Koebele also sent specimens of this sawfly from Na- 
toma, Cal., reporting it to be most destructive to pear trees in that region. 
He also noticed the same species ovipositing on pear trees at Santa 
Clara. If disturbed, the parent insect falls to the ground and remains 
Fm.lQ.—Gymnonychus calif ornicus: a, female; b, lateral view of tip of abdomen, showing sheath 
andcercus; c, claw and pulviUus— all enlarged (original). 
motionless for a time, with the antenna' and legs bent closely to the 
body. The characteristic features of the adult insect are indicated in 
the accompanying figure (fig. 10). It is probable that this is the unde- 
termined pear sawfly referred to by Dr. J. A. Lintner as being very 
injurious in the Hammond nurseries, Geneva, N. Y., May 29, 1804. 
(2nd Kept. N. Y. State Entom., 1885, p. 5.) 
2. Gymnonychus proximatus Norton. 
1861. Xe7natit$ proximatus Norton. Proc. Bost. Soc. Nat. Hist., vin, p. 160. 
1867. Nematiis proximatus Norton. Trans. Am. Ent. Soc, I, p. 202. (Cat., etc., 
p. 64). 
1878. Nematiis proximatus Provancher. Nat. Can., x, p. 55. 
1883. Xematus proximatus Provancher. Faun. Ent. Can. Hym., p. 185. 
Male. — Length 5.5 mm.; rather slender, shining; head and thorax 
punctured; clypeus squarely truncate; crest of head rounded, almost 
