552 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



Fig. lS5.—Dynastes tityus.— After Kiley. 



zoutal projection of the front part of the thorax, and the lower curving upward from 

 the crown of the head. Beneath the color is black, while the thorax and wing-covera 



are of a pale olive-brown, the latter 

 dotted irregularly with black spots of 

 various sizes, of which some of the 

 largest are ocellated. The legs are 

 sljining black, and are armed with 

 horns and spines. 



The grub which produces the beetle 

 fortunately is not to be numbered 

 among our insect pests, as it only at 

 tacks, so far as my knowledge of its 

 habits extends, decaying trees. It is 

 of not infrequent occurrence in the 

 State from which these examples were 

 sent, and in other Southern States. It 

 is rarely met with in Pennsylvania, 

 and has never, I believe, been found 

 in the State of New York. Dr. Fitch 

 includes the species among those affect- 

 ing the cherry tree. The beetles feed 

 upon the leaves of various trees, to 

 which from their voraciousness, when 

 numerous, they prove very destruc- 

 tive. When they attack our shade and ornamental trees their ravages may be 

 checked by applications of Paris green or London purple to the leaves by a force 

 pump, or by jarring them from the branches and destroying them when they fall. 



23. Thysanocnemis fraxini Le Coute. 

 Order Coleoptera ; family Curculionid^e. 



All that we know of the habits of this weevil is Dr. Le Coute's remark : 

 " Several females collected by Mr. Pettit on ash trees in Canada." 

 (Rhyuchophora, 214) He states that Thy sanocnemis is ^^ a, singular 

 genus somewhat resembling Antkonomus in appearance, but known at 

 once by the front tibite of the male being broader than usual, sinuate, 

 and densely fringed on the inner side with long hair." He describes the 

 species as follows : 



Beetle. — Ferruginous, clothed with yellow hair. Beak finely punctured, obso- 

 letely striate. Prothorax densely punctured. Elytra with punctured strije, and 

 slightly convex, nearly smooth interspaces; with abroad transverse baud occupying 

 the middle third, and dilated at the margin, less densely pubescent, and of a darker 

 color. Length, 3.7"™ (.15 inch). 



24. The ash gali.-louse. 



Pemphigus fraxinifolii Thomas. 



Order Hemiptera; family Aphid.e. 



Dr. Buudy, from whom the specimens were obtained, says Professor 

 Thomas in his third annual report, 1879, p. 146, furnishes the following 

 note in reference to them, made at the time they were discovei ed : 



On ash, June, Sauk City, Wis. On the under surface of much deformed, crumpled 

 leaves. Female ; abdomen dirty green, somewhat darker at the base, sprinkled witli 



