36 



short; in the other two species they are moderately long but shorter 

 than in speciosata. 



Hydriomena mediodentata B. & Mc.D. (PI. VI, Fig. 3). 



This obscure species has the basal portion of the Uncus rather 

 broad with two stout curved hooks, broaden- 

 ening apically, projecting downward from its 

 under surface. Apart from the 9 type and 

 g<Y,'-'-''.«':5^ the single <J specimen mentioned in Contr. 



Ill, 22, we have seen no other specimens of 



Fig. 11 

 Uncus of H. mediodentata the SpCcicS. 



Hydriomena costipunctata B. & McD. 



This species has nothing whatever to do 

 with speciosata as suggested by Mr. Swett (C. 

 Ent. 47, p. 10) ; the Uncus, as may be seen 

 from our drawing, is of a totally different 

 shape. We have seen no material other than 

 the types; our figure (Contr. I, (5) PI. II, 

 Fig. 14) should render the species easily 

 recognizable. 



Hydriomena magnificata Tayl. (PI. \T, Fig. 9). 



Flc. 12 

 Uncus of H. L'ostit^unctata 



Apart from the type specimen we have 

 two specimens in the Collection from Palmer- 

 lee, Ariz. (April) one of them, which we fig- 

 ure, exceptionally perfect ; the Uncus is very 

 long and spoon-shaped. 



Fig. 13 

 Uncus of //. niagniticata 



In conclusion we offer the following arrangement of the species of 

 this group to supplant that of our Check List. 



Genus Hydriomena Hbn. 

 * 1 furcata Thun. 

 clutata Hbn. 

 form fuscoundata Don. 

 form periclata Swett. 



