REPORT OF THE STATE ENTOMOLOGIST I9IO 59 



flies appear early in spring, while others do not issue till the latter 

 part of June. One parasite, Limneria lophyri Riley, has 

 been reared from this sawfly. This species may occur upon both 

 white and hard pines from midsummer till late fall. The parent 

 insects deposit their eggs in little slits in the leaves. They are 

 rather stout, 4-winged sawflies, the common name being givea 

 because of the sawlike appendage at the tip of the female ab- 

 domen. This sex has a wing spread of about two-thirds of an 

 inch, is honey-yellow, the head and thorax being a little darkei, 

 the latter and the abdomen being slightly marked with black. The 

 male has a wing spread of about one-half of an inch, and the body 

 is black, except the yellowish underside and the tip of the abdomen. 



Experience has shown that this species is most likely to injure 

 young pines, consequently it is well, where feasible, to watch for 

 the appearance of the pests in such plantings and if circumstances 

 warrant, adopt repressive measures. Many larvae can be jarred 

 from small trees by vigorous shaking and their ascent prevented 

 by an application to the trunk, of a sticky band such as tree tangle- 

 foot. There is no doubt but that thorough spraying with a poison, 

 preferably arsenate of lead (15 per cent arsenic oxide) would 

 destroy these leaf feeders. It might pay to resort to such practices 

 where only a few trees are badly infested, largely for the purpose 

 of reducing the likelihood of more extended subsequent injury. 



Spotted Cornus sawfly (Harpiphorus tarsatus 

 Say). This greenish yellow, black spotted sawfly was received 

 September last from Joseph H. Dodge of Rochester, through the 

 State Department of Agriculture, accompanied by the statement that 

 the larvae were very abundant and destructive to Cornus mas- 

 c u 1 a . This sawfly appears to be a rather common form and widely 

 distributed, since it has been recorded from Canada, Massachusetts, 

 Connecticut, Indiana and West Virginia. The eggs, according to 

 Dr Dyar, are deposited under the lower epidermis through a slit cut 

 from above. They are close to the midrib in a long line, the cuts 

 united. One edge of the swelling is on the midrib or large vein, 

 the other parallel to it but wavy and composed of numerous saw 

 cuts. The recently hatched larva is nearly colorless, with a slightly 

 fuscous head. The latter becomes darker as development pro- 

 gresses and eventually black, while the body remains whitish or 

 pale olivaceous, the black marks appearing in the sixth stage. The 

 following description was drafted from full-grown living larvae : 



Larva. Full-grozun. Length 2.5 mm. General characters: head 

 black, body greenish yellow with subdorsal and sublateral rows of 

 black spots, venter orange- yellow. 



