76 PROTECTION' OF PLANTS, 1916-17 



17. — Marginal white broken by terminal line, 21-24mm. — pascuellus. 

 17. — Marginal white broken below cell, 18-20mm. — labradoriensis (M-J). 

 17. — Marginal white not broken by terminal line. — alhellus (JU). 

 18. — Dark line parallel to stripe throughout wing, 24-30mm. — leachel- 



lus (J-A). 

 18. — Dark line parallel to stripe below cell, 20-23mm. — hamellus (A). 

 18. — Dark line parallel to stripe absent, 21-25mm. — praefectellus (J.) 

 19. — Sharp tooth near end of stripe, hind-wings white, 18mm. — bidens 



(JU). 

 19. — Sharp tooth absent, hind-wings grayish, 18mm.- — alboclavellus (JU). 

 20. — -Terminal dots are preceded by black lines, 23mm. — laqueatellus 



(J-S). 

 20. — Terminal dots not preceded by black lines, 21mm. — agitellus (J-JU). 

 21. — Markings dark brown, terminal line curved and double, 12-15mm. 



elegans (JU). 

 21. — Markings, yellow, terminal line angular and single, 16mm. — albel- 



liis (JU). 

 21. — Markings, an orange and yellow longitudinal stripe, 23-25mm. — 



girardellus (JU). 

 21. — Markings, a few dark dots near middle and outer edge, 22-25mm. — ■ 



tiirbatellus (JU). 

 21. — Markings, absent, both wings are a pearly white, 20mm. — perlellus. 



-(J-JU). 



N.B. The size of the moth is given in millimeters to the left of the name 

 of the species, the capitals to the right indicate the months when the moth 

 has been on the wing in the Province of Quebec. 



Of the species given in the above synopsis a few have not been recorded 

 from Quebec, but as they are found nearby in the neighboring provinces, 

 they have been included. AgitatelUis, alboclavellus, hortuelliis, miUabilis and 

 ruricolellus were the most abundant forms found on the vacant lots around 

 Loyola last summer. Dozens were frequently taken in a single swoop of the 

 net, as many as one hundred and tvventy in a minute. 



Most of the Crambus are very prolific. Dr. Felt records captured 

 females of mutalbis and hortuelliis laying seven hundred or more eggs. 

 The aggregate destruction caused by the larvae of these moths must each 

 season be truly enormous. But as the damage is distributed throughout the 

 growing season and each species is most destructive at a different tirne from 

 the other species found in the same locality, the ravages of the Crambus are 

 difficult to estimate. 



