126 THE CANADIAN ENTOMOLOGIST. . . 



taria has the male antennae fiHform and strongly ciliate beneath, hence its 

 place is in the allied genus Euchoeca, Hiib., with which in other respects 

 it perfectly agrees. Duodecimlineata was stated by Dr. Packard to have 

 pectinate antenna? (Monograph of Geometrid Moths, 1876, page 83), 

 where he characterizes the genus Epirrhita, Hiib., under which he places 

 it, but in his description (page 84), he states merely that they are " well 

 ciliated." In both he was correct, but he failed to observe that his species 

 possessed that anomaly in construction, unipedinate antennae, the single 

 "row of pectinations beneath, being flanked on either side by a row of cilia, 

 and tipped with a fascicle of hairs, the apex being simple. For some 

 time I tried to convince myself that they should be called serrate, but 

 the pectinations are long and proceed from the centre of each 

 joint, and are not an enlargement of either end. This structure removes 

 it from Venusia, and necessitates the erection of a new genus, since, so 

 far as I am aware, none has been established to cover the requirements 

 found in its construction. I give it, therefore, a name, Nomenia, n. g., 

 and the species will be known as Nojnenia duodecijnlifieata, Pack. It is 



defined as follows : 



Nomenia, n. g. 

 Palpi short, slender, scaled ; front rounded, smooth scaled ; tongue 

 developed ; antennae of ,$ unipectinate, pectinations tipped with a fascicle 

 of hairs, and on each side a row of cilia, apex simple, in 9 filiform simple, 

 thorax and abdomen untufted ; fore tibife unarmed, hind tibiae with all 

 spurs in both sexes slender, without hair pencil in ^ ; fore wings, one 

 accessory cell, 12 veins, 3 and 4 separate 6 and 7 from point ; hind wings 

 8 veins, 3 and 4 separate 6 and 7, long stemmed, 8 with cell to beyond 



middle. 



It seems strange that this species should have passed under the 

 hands of many able observers, and yet that this antennal feature should 

 have been unnoticed, and stranger still that the forms from British 

 Columbia, and from the East, with their simple ciliate antennae in the 

 males, should have been so long associated with it. These latter are one 

 species, which belongs to the genus Euchoeca, Hiib., and is nameless. 

 The ground colour is paler, and, as is frequently the case, the Western 

 form is larger, but aside from this I can find no difference in structure or 

 markings. It will be known hereafter as 



Eucha-ca salienta, n. sp. — Of the same form with its congeners, the 

 ground colour of both wings above, pale ashen in Eastern, nearly white in 

 Western s[)ecimens, sparingly mixed with dark brown or black scales. 



