84 ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



Several pupae and larvae were taken, one adult appearing a short time 

 afterwards. As far as I am aware this insect has not been reported 

 in injurious numbers in Maryland for many years past. 



The cabbage hair-worm (Mermis albicans Diesing). — Four speci- 

 mens have been sent to the office of the State entomologist for identi- 

 fication. Accompanying each the usual distress has been expressed 

 as regards eating affected cabbage. 



The southern com root-worm {Diabrotica duodecimpunctata 01.) . — 

 This insect has caused apparent total destruction of a small field of 

 sweet corn on the experiment station farm. The fact that the piece 

 of land was low and uncultivated for some time is an explanation for 

 the severity of the attack. 



The catalpa sphinx {Ceratomia catalpa Bdv.). — The larvae of this 

 insect were especially numerous the past season. Many specimens 

 were received at the office and much injury observed to catalpa trees 

 in many parts of the State. 



The tvoolly apple aphis (Schizoneura lanigera Hausm.). — This in- 

 sect continues to cause injury in orchards as well as in the nurseries. 

 The results of the use of two applications of tobacco dust in the 

 nursery on Ben Davis apples were very encouraging. 



Mosquitoes. — A preliminary investigation of this class of pests was 

 begun in Maryland the past summer. The work was conducted by 

 Mr. A. B. Gahan, assistant entomologist, and Mr. T. Homer Coffin. 

 About 23 species were found in and around Baltimore. It is hoped 

 that we may be able to make a thorough investigation of the number 

 of species occurring in the State and employ means for suppressing 

 them. 



INJURIOUS INSECTS OF 1905 IN MINNESOTA. 



By F. L. Washburn, St. Anthony Park. Minn. 



This has been a year of surprises in that certain destructive pests 

 have been unexpectedly active, while others, which we will always 

 have with us and which usually work havoc each year, have done 

 little or no injury during the past season. The Hessian fly (Maye- 

 tiola destructor Say) has been present on grains and grasses, but to a 

 limited extent, not sufficiently noticeable to cause complaint. The 

 chinch bug {Blissus leucopterus Say), companion pest of the Hessian 

 fly, has been conspicuous by its absence, though a few were reported 

 from one or two localities. 



I have to report quite a serious loss to farmers who would raise 

 alfalfa seed, through the voracious appetite of the red-legged locust 

 (Melanopus femur-rubrum De G.), which prevented the formation of 

 seed on many acres in Hennepin County. This was not reported to the 

 entomologist until the damage was done. In fact, the farmers them- 

 selves did not realize the havoc which was quietly going on in their 



