60 
but in sincera, which has almost identical genitalia and thoracic vestiture, 
there is only a single apical spine present (at the most) just as in laetabilis. 
The genitalia of atrata and speciosa are also far too much alike to permit of 
the thoracic vestiture being used as a means of generic separation, and 
the type of maculation of the latter obviously connects it with laetabilis, 
although in the one case the clasper is rounded apically and in the other 
emarginate. 
Under the generic heading Anomogyna the writer, therefore, includes 
the following species in which at least some trace of spining on the fore 
tibiae remains — most frequently a single weak apical spine on inner side 
concealed in vestiture and easily overlooked: atrata Morr. and its race 
yukona McD., sincera H. S., speciosa Hbn. (all with rounded apex of clasper), 
laetabilis Zett., beddeki Hamp. and its western form partita McD., livalis 
Sm. (presumably), homogena McD., imperita Hbn., arufa Sm. (which I do 
not know), and occidens Hamp. 
On account of genitalic similarity there is also added youngi Sm., 
elimata Gn. and its so-called forms dilucida Morr., badicollis Grt., and 
janualis Grt., grisatra Sm., and atoma Sm. These possess bipectinate 
antennae and apparently lack all trace of fore-tibia! spining; they show, 
however, the same long third palpal joint and the thoracic tufting found 
in the first group, and the type of wing-maculation is only a slight modi- 
fication of that found in sincera. In the genitalia all these are practically 
identical and the only marked distinction from the preceding group is the 
longer and better-developed harpe, but as this is a variable feature even in 
the first group it is regarded as merely of specific value. 
Finally, the writer includes infimatis Grt. and vernilis Grt., with 
serrate and fasciculate antennae, no fore-tibial spining, and narrower wings, 
with a rather different type of maculation. In the genitalia the most 
noticeable difference is in the shape of the tegumen, which in both species 
is very similar to that of c-nigrum (vide figure) and quite atypical. 
No generic term is available for either of the two last groups and a 
separation from Anomogyna would involve the erection of new genera, 
which at the moment is scarcely advisable. Smith’s usage of Semiophora 
Steph. for the first of the two groups, on the strength of Butler’s recom- 
mendation, is an error. 
Trichagrotis gen. nov. 
Type, Trichorthosia spinosa B. and McD. 
Eyes strongly hairy. Palpi upturned, the third joint slightly porrect; 
second joint rather closely fringed with scales beneath (as far as can be 
told from single rather worn specimen), third joint rather long, smooth- 
scaled. Front smooth. All tibiae well spined; fore tibia about twice the 
length of first tarsal joint, with irregularly placed spines on both outer and 
inner sides in at least the distal half. Tarsi with only three rows of spines 
but these heavy, the median one being frequently supplemented by addi- 
tional finer spines, irregularly placed. Thoracic vestiture largely scaly 
(specimen too crushed to note the tufting, if any). 
