408 ON SPECIES OF IIADENA SMITH. 



and confined to the basal segments, the abdomen and body also more 

 cylindric, while in the others the tnfts are definite, distinct, truncate 

 bunches of hair, the abdomen and body more depressed or flattened, 

 less cylindric. There is a general agreement in the sexual characters 

 of the male, with one serious exception only. L. stipata Morr., while 

 otherwise perfectly agreeing with loculcUa and others, is thoroughly 

 aberrant in genital characters, and forms a solitary exception to an 

 otherwise uniform tendency. 



For present convenience the species of Luperlna will be treated first, 

 and to this subgenus must be referred those species which in the char- 

 acters of Sac7e/i« lack the distinct tufts of the abdomen, which becomes 

 also more cylindric and plump in both sexes. The thoracic tuftings 

 are reduced in size, the vestiture is more smooth and scaly, and the 

 thorax itself seems shorter. 



The species are readily distinguished : 



Burgessi — of which Radenn discors is a synonym — and longula are 

 dark gray species with a narrow black streak connecting the median 

 lines. 



Burgessi has white secondaries, the outer margin narrowly dusky, 

 and the primaries are rather narrow. The clasper is long and slender, 

 somewliat thickened toward the middle. 



Longula is decidedly broader winged with essentially the same mark- 

 ings as the preceding ; but the secondaries are^dusky and the clasper 

 of the male is much shorter and thicker. 



Passer Gn {locnlata Morr.) is readily distinguished by the even brown 

 color, more or less verging to gray, and the prominent black claviform, 

 the ordinary spots also more or less distinctly black ringed. The pri- 

 maries are rather broader, with obtuse, somewhat rounded apices. 

 The genitalia of the S lack the clasper, and the tip of harpes is rather 

 narrower than r.sual, with a dense brush of spinules interiorly. Con- 

 spicua is an aberration rather than a variety, and is distinguished by a 

 paler, rather red, color, with a dusky suffusion over the cell, the lines 

 distinct, and a distinct black shade before the s. t. line. 



Niveivenosa is readily distinguished by the white marked veins, giv- 

 ing it a deceptive resemblance to certain species of the quadridentata 

 group of Agrotis {Carneades), which misled Mr. Grote in his generic 

 reference of the species. I have seen no male. 



Stipata has the median vein and its forks at end of cell white to the. 

 t. p. line, and a heavy black shade through median space, easily defin- 

 ing the species. In genital structure the species is aberrant. The 

 harpes are broad, rather even, the superior margin thickened, more 

 chitinous and obtusely prolonged, while from the inner side, just 

 within the tip, they give rise to two small acute processes which are 

 corneous. The relationship of this form is obscure ; but I can not find 

 a more satisfactory position for it at present. 



