278 MAINE AGRICULTURAL, EXPERIMENT STATION. 1907. 



dations on potato and certain garden vegetables their benefits 

 as a destroyer of grasshoppers must be taken into account. An 

 oil beetle, Meloe angustkollis, closely related to the blister 

 beetles, was found here and there eating potato leaves, but these 

 are not numerous enough to do any damage. 



Trichocera regelationis Linne. — Maggots breeding in pota- 

 toes. May 17, in response to complaints of maggoty potatoes, 

 a visit to Patten was made in order to examine the infested 

 potatoes. Great numbers of slender maggots were found in a 

 lot of potatoes that froze last fall and were soft and rotting in 

 May. Some of these potatoes were placed in the insectary and 

 the adults which emerged about June 1 proved to be the species 

 recorded. A second generation developed in the insectary, 16 

 adults appearing about October 26. Whether this species would 

 develop in healthy potatoes was not ascertained. 



Gall Insects. 



No attempt has been made to list the insect galls of Maine. 

 The following few species taken in this State are in the Station 

 collection, together with the insects emerging from them. Such 

 of these as had not previously been determined were submitted 

 to Mr. William Beutenmuller, American Museum of Natural 

 History, who kindly determined them : 



Aphid galls. — Pemphigus rhois, Fitch, on sumach ; Pemphigus 

 populimonilis, on Populus balsamifera ; Hormaphis hamamelidis, 

 Fitch, on Hamamelis virginiana ; Hamamelistes spinosus, Shiner, 

 on Hamamelis virginiana ; Colopha ulmicola, Fitch, on elm ; 

 Chermes abietis, Linn, on spruce. 



Mite galls. — Acarus serotinae, on wild cherry; Acarid, on 

 Amelanchier; Phytoptus (Eriophyes) quadripes, Shimer, on 

 Norway maple. 



Dipterous galls. — Cecidomyia niveipila, O. S., on oak; Ceci- 

 domyia sp., on hazel nut ; Cecidomyia sp., on Crataegus ; Ceci- 

 domyia batatas, O. S., on willow ; Cecidomyia strobiloides, O. 

 S., on willow; Cecidomyia rigidse, O. S., on willow; Cecidomyia 

 solidaginis, Loew., on golden rod. • 



Hymenopterous galls. — Andricus palustris, O. S. ; Andricus 

 punctatus, Bass., on oak; Andricus (Callirhytis) scitula, Bass., 

 on oak twigs; Andricus sp., on red oak; Andricus ventricosus, 



