30 MAINE AGRICULTURAL LXPERIMENT STATION. I9IO. 



ber, 1909. Pinifoliae and abiefis were treated in an economic 

 bulletin No. 171 of this Station and the six species are de- 

 scribed and figured and the main points in their life histories 

 given in Chermes of Maine Conifers, Bulletin 173 of this Sta- 

 tion. 



A woolly species, Pemphigus venafuscus Patch, on the stems 

 ot ash occurred in abundance in the vicinity of Orono. This 

 species was described and figured in Entomological News, July, 

 1909. 



The Canadian tick-trefoil is yearly visited by a plant louse 

 causing leaf curl and twist. This was described as Microparsus 

 variabilis new genus and new species in Entomological News, 

 October, 1909. 



Gall making aphids of the elm were abundant but as the 

 group will be treated more fully in a separate publication it is 

 not necessary to discuss them here. 



Anaphothrips striata (Grass thrips). 



Late in June Timothy grass showed the characteristic dry and 

 bleached stems due to injury by the grass thrips. In some 

 meadows considerable areas were rendered conspicuous in this 

 way. (Lot 750.) 



ORTHOPTERA. 

 (Grasshoppers, roaches and crickets.) 



Grasshoppers caused enough damage during 1909 as during 

 1907 and 1908 to be classed as a plague. Orchards and garden 

 crops suffered from the attacks of these ravenous insects. The 

 species concerned, as far as ascertained, were the same as those 

 mentioned in the Insect Notes for 1908. 



DIPTERA (Flies). 



Mycetophilidae (Fungus gnats). 



A work on the fungus gnats of North America is now in the 

 course of preparation, the first part of which appearing in Bul- 

 letin 172 of this Station. As it is the purpose to discuss in that 

 paper in detail the habits of several species, it will only be 



