ENTOMOLOGICAL SOCIETY 



sap ota gum) or court plaster is used. Cigarette ashes are 

 sometimes worked into the larva sac but tend to increase the 

 irritation and seldom kill the insect. 



Mr. Titus mentioned that Mr. R. J. Crew, when collecting 

 in British Guiana, found that he had one of these larvae in 

 the calf of his leg, but was unable to breed it out on account 

 of the severe pain and probability of blood-poisoning fol 

 lowing the attack. He had the larva removed after reaching 

 his home in Canada. Mr. Knab noted that on his recent trip 

 to Central America and Mexico he had seen several cases 

 where the larva was present in human beings. Doctor Stiles 

 stated that this species was known to occur in hogs, dogs, and 

 monkeys on the Isthmus of Panama. 



Dr. F. W. Coding, U. S. Consul at Newcastle, New South 

 Wales, was introduced and spoke several minutes on the 

 entomological conditions in Australasia. He stated, among 

 other things, that the museums in those colonies would be glad 

 to send their specimens to this country and get them worked up. 



Doctor Hopkins then presented the following paper and 

 exhibited specimens and work of several of the species treated : 



BARKBEETLE DEPREDATIONS OF SOME FIFTY YEARS 



AGO IN THE PIKES PEAK REGION OF 



COLORADO. 



By A. D. HOPKINS, Ph.D. 



In the course of my studies of forest insects in different sec 

 tions of the Rocky Mountain region during the past six years, 

 I have been specially interested in the frequent evidences of 

 wide-spread depredations by barkbeetles, found on old, dead, 

 and fallen timber. During investigations last month (October, 

 1905) in the Pikes Peak region of Colorado much additional 

 evidence was found on old, dead, standing, and felled trees of 

 the work of the Black Hills beetle (Dendroctonus ponderosce 

 Hopk.) on pine, the spruce-destroying beetle (D. plceaperda 

 Hopk.) on Engelmann spruce, and the Douglas spruce Den 

 droctonus (D. pseudotsugtz Hopk.) on Douglas spruce, indicat 

 ing that all of these species have been present and destructive to 

 living timber in this region for from thirty to fifty years. The 

 number and distribution of such old beetle-marked trees indi- 



