October, '22] scientific notes 373 



a list of Hemiptera frequenting potato vines may prove suggestive to persons inter- 

 ested in experimental work with disease transference. The following insects were 

 collected from potato at Presque Isle, Aroostook County, Maine in 1921 by the writer 

 and field assistant, and were determined by Dr. Herbert Osborn. While certain 

 of them may have been resting on potato vines by chance, most of them were common 

 enough to be taken repeatedly though none, except Lygus pratensis, were abundant 

 enough the past season, to assume significant economic importance. It will be no- 

 ticed that Empoasca malt is conspicuous by its absence^ Cosmopepla carnifex, 

 July 15; Canthophorus cinctus, July 15; Adelphocoris rapidus, July 15-25; Poecil- 

 ocapsus lineatus, July 15; Lygus pratensis, July 15-Sept. 8; Philaenus spumarius, 

 July 15- Aug. 20; Philaenus lineatus, July 15; Clastoptera proteus, July 15; Ceresa 

 hasalis, July 25- Aug. 20; Platymetopius acutus, July 15; Acocephalus nervosus {stria- 

 tus), July 15-Sept. 8; Phlepsius apertus, July 31; Graphocephala coccinea, Aug. 6; 

 Agallia sanguinolenta, July 31. 



The following predaceous damsel-bugs were present: Nabis roseipennis, Aug. 25.- 

 Sept. 8; Nabis ferus, July 15-Sept. 8; Nabis limbatus, July 15; Nabis subcoleoptratus, 

 July 31; Pagasa jusca, July 31. 



Euschistus tristigma, Sept. 11; and Pentatoma juniperina, July 11, were found 

 feeding on potato vines at Caribou, Aroostook Co. in 1906 (Bulletin 134, Me. Agr. 

 Exp. Sta.). 



Edith M. Patch 



Mexican Bean Settle: We have just received what appears to be the first official 

 record of the Mexican Bean Beetle, (Epilachna corrupta Mull.) in the state of Utah in 

 some material sent in for determination. This material was collected at Rockville, 

 Utah, July 5, 1922, by V. M. Tanner, St. George, Utah. Incidentally, this may also 

 be the most westerly infestation of this insect yet reported. 



George M. List 

 Colorado Agricultural College, Fort Collins, Colo. 



The Value of Carbon Bisulphide in Combating Tent Caterpillars and Mosquitoes. 



In the use of fire torches for the destruction of tent caterpillars, often a considerable 

 number of smaller twigs and limbs are damaged or killed by the heat, and ground 

 fires may be started from the droppings from the torch. 



Carbon bisulphide seems to be very effective in killing these pests and may be used 

 as follows: Take a long pole with a blunt point at the end, place on this point a 

 piece of raw cotton well saturated with carbon bisulphide. This should be pushed 

 into the web and, by turning the pole, be left inside where the fumes will almost im- 

 mediately kill all the occupants. 



In the control of mosquitoes, gasoline is objectionable on account of it making the 

 water unfit for many purposes. Last June the water in a ten-gallon tub was found 

 to be swarming with the larvae of mosquitoes. A few drops of carbon bisulphide 

 was poured into the receptacle and it sank to the bottom, resembling pearl-like bodies. 

 Within a few minutes there was undue agitation among the insects and at the end of a 

 half hour all were dead and floating on the surface of the water. The carbon bisul- 

 phide did not give the slightest taste or smell to the water. 



A. K. Fisher, U. S. Biological Survey 



^Reported as "fairly common" in beans at Houlton (Bui. 236 Me. x'\gr. Exp. Sta.) 



