THE GEXUS DENDROCTONUS. 149 



Pupa. In addition to the generic, divisional, and subdivisional 

 characters, the front and middle femora are armed each with a minute 

 apical spine; abdominal tergites 1 to 6 have moderately small pleura! 

 spines, 1 is without dorsal spine, but with distinct lateral ones; 2 to 6 

 have small dorsal and lateral spines, the former increasing in size to 6. 

 All have pale tips; 7 and 8 unarmed; 9 with usual stout pleural spine. 

 Pupal type labeled "Hopk. W. Va. 7701." 



The usual variation prevails in the number and arrangement of 

 minor spines and between the young and older examples. 



The character \vhich in general serves to distinguish the pupa of 

 this species from the preceding is found in the paler tips of the body 

 spines. 



Larva. In addition to the generic, divisional, and subdivisional 

 characters, front of head with posterior angle and median area not 

 elevated but transversely rugose except near apex, where it is smooth; 

 epistoma flat, opaque, smooth, with straight anterior margin; clypeus 

 broad, prominent, convex, with faint median longitudinal line, sides 

 rounded, apex broadly emarginate; labrum short, with sides nearly 

 parallel and apex tuberculate. Pro thoracic tergum with two broad, 

 shining dorsal plates separated by a rather broad median space, and 

 a smaller lateral plate each side; sternellar lobes each with a faint foot 

 callus; mesoterga and metaterga with shining plates on the lateral 

 lobes. Abdominal scutellar lobes with a rather prominent tubercle 

 on each epipleurum. Larval type labeled "Hopk. U. S. 1201." 



The larva of this species is scarcely to be distinguished from that of 

 D. valens. 



Galleries. The egg galleries are generally longitudinal, more or less 

 winding, and vary greatly in length, sometimes being very long. 

 They are irregular in width, sometimes with branches, and are slightly 

 grooved in the surface of the wood. The eggs are placed in masses at 

 intervals along the sides and in the inner bark; the larvae excavate 

 broad chambers which vary in size from a square inch to many square 

 feet. The galleries of this species do not differ materially from the 

 following, and have a wide range of variation in size and general 

 character. 



Distribution (fig. 90). (Hopk. U. S.) Alabama: Calhoun. Dela- 

 ware. District of Columbia: Takoma. Georgia: Cornelia, Thomas- 

 ville. New Jersey: Lakewood, New Brunswick. New York: Islip 

 (Long Island). South Carolina: Chicora, Lumber, New Landing, 

 Pregnall. Texas: Austin, Call, Deweyville, Kirbyville, Tarkington. 

 Virginia: Glen. West Virginia: Kanawha Station. (Hopk. W. Va.) 

 West Virginia: Crow, Marion County, Morgantown, Romney. Addi- 

 tional localities from other collections: (Le Conte) Georgia, North 

 Carolina, New Hampshire, Pennsylvania. (M. C. Z.) Texas, South 



