26o DAVENPORT ACADEMY OF SCIENCES. 



of about the same color, though the older ones are often -quite 

 orange, with the external edge of the wing-pads dusky. Eyes 

 and ocelli red. Except a very slender, cylindrical one each side 

 of the head, between the eyes and ocelli, all tubercles are greatly 

 reduced in size and become quite obsolete on the abdomen in 

 some specimens. There are no lateral tubercles, except one each 

 side at the posterior angle of the head, one each side near poster- 

 ior angle of the prothorax, and two e^ch side on the meso thorax. 

 Surface of body still more coarsely rugose and covered with min- 

 ute, sharp points. 



Winged MIGRANT. — Length of body 0.6-0. g'""-. Expanse of 

 wings 2-2.8""- Color of body yellow or orange ; the prothorax 

 generally somewhat the darkest ; head of color of prothorax, with 

 a .slight dusky tinge; eyes in the younger specimens red and in 

 the older ones dark purple ; ocelli yellowish, bordered along the 

 inner edge with red in the younger specimens and with brown in 

 the older ones ; antennae and legs dusky ; the prothorax is 

 marked each side, anteriorly, with a sub-dorsal group of two or 

 three more or less distinct and more or less confluent, depressed 

 dusky spots, and with two transversely ovoid, medio-dorsal, pale 

 dusky spots near the posterior margin ; inesothorax and sternum 

 blackish. Head and prothorax delicately rugose. Granulation 

 of abdomen minute. Antennae rather slender ; the basal joint 

 stoutest a.nd longer than the second, both stoutest apically and 

 with but faint traces of annulation,; joint 3 slender and of almost 

 uniform diameter., its sensorium rather more than two-thirds the 

 length of the joint ; annulation almost obliterated, more distinct 

 at the basal one-third ; tip furnished with three very fine, appar- 

 ently capitate, hairs. Wings delicate, almost colorless. In some 

 specimens the venation of front wings and greater part of stigma 

 is very pale, while in others the costa, stigma, costal cell and dis- 

 coidal vein are dusky, the remaining two veins delicate, often 

 almost colorless ; the stigmal vein rarely touches the stigma, but 

 continues in a curved, very delicate, colorless line which connects 

 it with the discoidal vein. Subcosta of posterior wings distinct,, 

 parallel with the costa and running almost to the apex of the wing. 



This species has been found to infest both the upper and under 

 side of the leaves, especially along the midrib, of Castanea vesca 



