76 THE LEPIDO PTERIST 



and when stained with a reagent. Frequently under 

 pressure of the cover glass the ductus ejaculatorius or 

 vessica, as it is called, protrudes from the side or tip 

 of the adaeagus. 



Dr. McDunnough published a very interesting article 

 in The Canadian Entomologist. X'olume XLIIII, page 

 181, June, 1911, and should be read by everyone in- 

 terested in the study of genitalia. 



However, there will, no doubt, be many changes 

 in the synonomy of parts as the different groups of 

 insects are corrolated. 



I have not studied the shape of the uncus or the 

 arrangement of the spines on the valvae and they may 

 afford some help. 



The female genitalia of Xanthotype crocataria, 

 figure 3G. consists of the ovipositor attachment, an 

 elongated bag with neck, containing, near the center, 

 a round, doughnut-shaped body called the signum. In 

 Xanthotype, wide penis group, the signum appears to 

 differ slightly, but I cannot make out constant charac- 

 ters. In other genera the signum affords beautiful 

 characters for separation. Below I include the litera- 

 ture in regard to Xanthotype crocataria which, no 

 doubt, includes other species overlooked by the older 

 authors. It can readily be seen that the easiest and 

 most accurate way to separate crocataria is by the 

 genitalia as the markings are so variable. 



Xanthotype 



1798 Crocataria Fahricius Supp. Ent. Systematicae 



No. 43, page 450 

 1825 Huebner, Zutraege Exotische Schmetterlinge 

 1857 Guenee, Species General Phal. 1, Page 114, 



No. 175. 

 1860 Walker, List of Lepid. and Meter, in the Brit. 



Museum, Vol. XX. page 143 

 1860 Walker, Can. Naturalist, Vol. 5, Page 260. 



