PROCEEDINGS, 1918 



9 . Fore wing pearly white without markings of any kind. 



Crambus perlellus 



9. Fore wing nearly white with central black spot and row of 



terminal black dots. 



Crambus turbatellus 



10 . White stripe crossed by two oblique heavy dark bars 



Crambus myelins 



10 . White stripe not crossed by oblique bars 11 . 



11. White stripe running uninterrupted to outer margin 



Crambus unistriatellns- 



11 . White stripe not running uninterrupted to outer margin 12. 



12. Expanse of wings 17 mm. or less, and apex of fore wing 



very acute. See plate fig. 20. 



Raphiptera minimella 



12. Expanse of wings over 17 mm., or if less, then apex not 



very acute 13 . 



13 . Hind margin of fore wing distinctly edged with white 



Crambus dissectus 



13 . Hind margin of fore wing not edged with white 14 . 



14 . Longitudinal white stripe at widest point at least half the 



width of wing at that point 15. 



14. Longitudinal white stripe at widest point not half the 



width of wing at that point 17 . 



15 . White patch beyond and below the point of the stripe con- 



fined to the sub-marginal 



Crambus bidens 



15. White patch beyond and below the point of the strip occu- 



pying the area on each side of the sub- terminal line 16 . 



16. White stripe divided throughout its length by a single 



dark line 



Crambus agitatellus 



16. White stripe not divided longitudinally 



Crambus alboclavellus 



17. Longitudinal white stripe abruptly narrower in its outer 



half. 



Crambus hamellus 



17 . Longitudinal white stripe gradually but not abruptly nar- 



rowing toward its outer end 18 . 



18. Small white patch just beyond and below outer point of 



white stripe. 



Crambus pascuellus 

 18. Without such white patch 



Crambus leachellus 



