35 



Hydriomena regulata Pearsall. (PI. VI, Fig. 15). 



We do not know this species but have received through the kind- 

 ness of the authorities of the American Museum photographs of the 

 types, one of which we publish ; Mr. Watson informs us that these 

 types are two 9 's, not S 's as stated in the original description. 

 Judging by the photographs the species must be intermediate between 

 siinilaris Hist, and the Arizona race of spcciosata, differing from both 

 apparently in the maculation of the basal portion of the abdomen ; on 

 account of the obscure maculation it is rather difficult to place from 

 a study of the figure alone and we must await the receipt of more 

 material before definitely deciding its position. 



Hydriomena similaris Hist, (glciiwoodata Swett.) (PI. VI. Figs. 



1. 2; Pi. X, Fig. 4). 



The type of genitalia shows that the species should be associated 

 with spcciosata rather than placed in the moderate palpi group ; the 

 Uncus is considerably broader than in either of the two preceding 

 species and is merely bluntly pointed, not tapering to a fine point; the 

 Aedoeagus is very heavily armed with spines and hooks and the prox- 

 imal portion is drawn out to a rather lengthy point, a quite unique 

 feature in the group. 



Our recently described species, termiiiipunctata, proves to be a 

 race of this species, characterized by its much paler color and better 

 defined markings as well as by the strong whitish terminal streaks of 

 secondaries which in the typical form are merely very faintly indicated. 



We have the type form from Colorado (Glenwood Spgs.), New 

 Mexico (Jemez Spgs.) and Arizona (Pinal Mts.) taken in June and 

 July ; the race terminipimctata from Stockton, Utah. 



HYDRIOMENA CYRIADES DrUCC. (PI. VI, Fig. 8). 



We have already recorded what appears to be this species from 

 Tucson, Ariz. (Contr. Ill, p. 23) ; if our identification be correct the 

 species will fall into this group the Uncus being pointed much as in 

 speciosata. 



The remaining three species show no very close relationship to 

 any of the preceding groups; as they are all found in Arizona it is 

 probable that their affinities will be with Mexican species rather than 

 with the more northern forms. In mcdiodcntata the palpi are decidedly 



