214 REVISION OF MAMESTRA SMITH. 



tinctive features. Mr. Grote compared the species to trifolU, from 

 which it differs in autenual structure, but which it very strougly re- 

 sembles iu the sexual characters. The harpes are broad basally, then 

 suddenly and obtusely augulated, and this arm again acutely augulated 

 so as to form a V. The tip is rounded and somewhat enlarged, in- 

 wardly spiuulose. The clasper is stout, corneous, bent at nearly a right 

 angle. 



Division B. 



This division differs from the preceding only in the simple or merely 

 ciliated anteunne of the $ . As the groups into which it is divisible 

 have been already defined, nothing more is necessary under this head, 

 and I proceed at once to the treatment of the special groups. 



Group W.-MACULATA. 



The distinctive feature of this group, as has been already stated, is 

 found in the distinct W-mark of the s. t. line of primaries. The species 

 so associated are readily distinguished, and some of them are really' re- 

 lated. Unfortunately, however, as a whole the group is nearly as arti- 

 ficial as the one immediately preceding, and there is a wide range of 

 difference in habitus, color, and sexual structure. For the present pur- 

 pose of aiding in the identification and arrangement of species and in 

 describing their peculiar sexual and other characters, the association is 

 the best I can devise. At a future time, when abundant material of 

 all the species will enable proper associations to be arrived at, abetter 

 sequence may be attained. 



A series of four species is separated off' by having the median space 

 somewhat darker, the transv^erse lines distinct, complete. 



Farnhami is unique in maculatiou, and has the habitus of a Prodenia, 

 The color is bright, violet brown, and the pale, yellowish streaking 

 through the median s[)ace over the claviform gives a distinctive ap- 

 pearance difficult to mistake. 



Liquida also stands solitary. It is a smaller species than /arrt/ia?;ti, 

 and very differently marked and colored. Over the fuscous-brown 

 ground is a bluish irroration, very strongly marked in basal and s. t. 

 space. A very distinct, pale shade of variable width follows the course 

 of vein 2, across the median space. 



Ciq)sula}is and vittula agree in rather broad primaries and unusually 

 short thorax, which gives the insects a rather peculiar appearance. 

 The vestiture is somewhat coarse, and the abdominal tuftings are not 

 distinct. Both are bluish ash-gray in color. 



Capsnlaris is distinguished by the large white orbicular, the upright 

 t. a., and strongly incurved t. p. line. 



Vittida is similar in general appearance, but the orbicular is small, 

 centered with dusky. The t. a. line is outwardly and the t. p. in- 

 wardly oblique, the median space therefore triangular. 



