2l6 MAINE AGRICUIvTURAI^ EXPERIMENT STATION. I909. 



worms,' from the snake-like appearance and movements of 

 some of the processions." 



Nothing further need here be said concerning habits as it 

 is proposed to discuss more fully the details of life history and 

 of injury caused by any given form under the respective species. 



Remedial Measures. 

 As a remedy against those species which feed upon the culti- 

 vated mushrooms Lintner in his loth report suggests occasional 

 api lications of pure and fresh pyrethrum in water, using it of 

 the strength of one ounce to 4 to 8 gallons of water, as the 

 larvae may be deeper beneath or nearer to the surface of the 

 beds. As a preventive measure the cellars may be closely 

 screened and the beds covered with small mesh screen frames. 

 For those which are associated with scab or rot the measures 

 taken in combatting these will also hold in check the ravages 

 which may be occasioned by the insect. The remedies and 

 preventive measures applied for the railroad worm or apple 

 maggot and the codling moth will also control the apple midge. 



TABI^E OE SUBFAMILIES. 



a. Medio-cubital crossvein (M-Cu) present; i. e., a vein con- 

 necting the media with the cubitus (figs. 70, 71), or 

 these veins contiguous for a short distance at the place 

 where the crossvein usually is. 

 b. The radio-medial crossvein (R-M) distinct, not oblit- 

 erated by the coalescence of a portion of radius and 

 media. 

 c. Radius with more than 2 branches, anterior branch 

 of the radial sector sometimes short and cross- 

 vein like, 

 d. The M-Cu crossvein far proximad of the 

 R-M crossvein, the cell M less or but little 

 more than half as long as cell R. (figs. 74- ^ j. 

 76). I. Sub-fam. Bolitophilince. j'' f ."^-' ' '- 

 dd. The R-M and the M-Cui crossvein nearly 

 equidistant from the base of the wing, 

 usually only one basal cell. 

 e. The radius with 4 branches (European). 

 Sub-fam. Pachyneurincc. 



