40 



Ostium weak, bilobed. Bursa delicately scobinate. 

 Signa two sets spined, one elongate pyriform, the other a 

 triangular patch. 



Cambrica, Curtis. 6 4 



Valva rounded; costa gibbose; sacculus arm broad, spatu- 

 late. Labides stout, hairy. Uncus very weak, atrophid. 

 JMoeagus long, subsigmoid. Saccus very large, rounded. 

 Ovipositor normal. Ostium weak. Bursa spined. 

 Signa two sets, one ovate spined, the other a spined patch 

 near the duct. 



Oporiminae. 



Valva rounded. Labides with heads united. Anal tube 

 long, often decorated with fine spines. 



Female usually with two scobinate signa. 



Operophtera brumata, L. 125 



Valva rounded, simple. Labides arched, hairy. Uncus 

 fairly long, spatulate, tip rounded; pads hairy. zEdoeagus 

 narrow. Cornutus long, dentate. Juxta bilobed below. 

 Cristse hairs short. Saccus long, pointed. 



Ovipositor rather long, retractile. Ostium encircled. 

 Ductus burssB cylindrical. Signa two, discoid, dentate. 



Boreata, Hb. 63 



Valva rounded, simple. Labides united, arched, hairy. 

 Uncus long, spatulate, tip with hard point; pads hairy. 

 JSdceagus pointed. Cornutus long, dentate. Juxta bilobed. 

 Cristae reduced to a single spine. Saccus long, pointed. 

 Ovipositor rather long, retractile. Ostium encircled. 

 Ductus bursae cylindrical. Signum discoid, dentate. 



Oporinia. 



The appearance of wing markings being somewhat alike, 

 the genitalic differences become of great value. It would 

 be well if collectors, when setting the males of these 

 insects, would open the valvae, when a hand lens would 

 show to which group the individual belonged. 



