March, 1903.] SmITH : NeW NocTUID.E FOR I903. 15 



rogenhoferi and iiiysfica : the latter being the only one not figured in 

 my revision of 1891. The genitalia are shown here at PI. I, Fig. 4, 

 and while they show a distinct agreement in type, also prove them- 

 selves different from any other species. Though the superficial resem- 

 blance to nimhosa is close, the genitalic resemblance is nearer to 

 imbrifera, while from both the new form differs in lacking the small 

 accessory clasper with spoon-shaped tip. 



Alamestra gussata, M. segregata and M. plicata prove to be more 

 nearly related than I had supposed, judging from superficial characters 

 only. A comparison of Figs. 6, 7 and 8 will show that all three have 

 genitalia of the same general type; the differences, such as appear, 

 being in part due to the difference in the arrangement of the double 

 claspers on the slide. But, curiously enough, while gussata2iX\^ segre- 

 gata are most nearly alike superficially, the genitalia are most dis- 

 similar, while plicata, which looks obviously different from either, 

 has a close genitalic resemblance io segregata. All the species have 

 the antennae serrated and bristle-tufted in the male, and agree in 

 general type of maculation. Plicata is the largest species, very even 

 in color, the markings neatly defined, no obvious median shade and 

 no black about or between the ordinary spots. Gussata is smaller, 

 broader-winged, with a grayish powdering over the brown base. 

 There is a more or less obvious dusky median shade, the maculation 

 is more broken and irregularly defined, a darker, brown shade tends 

 to connect the claviform to the t. p. line and the cell becomes darker 

 about the obscurely defined ordinary spots. In segregaia- we have a 

 more boldly defined form, the median lines well marLed, connected 

 by a black bar over the claviform, a variably defined though not 

 prominent W in the s. t. line, and the cell before and between the 

 ordinary spots black. All things considered, the species are fairly 

 well separated though closely allied and obviously descendants from 

 the same stock. 



Another member of this series is negussa in which the maculation 

 consists of narrow gray lines in a grayish-brown base. The genitalia 

 are practically like those of gussata, and with a sufficient series at hand, 

 it is probable that the two will be found to be forms of one species. 

 For the present this maybe held as a hoary-gray type without obvious 

 contrasts. 



In its superficial characters and in the general type of maculation, 

 Mamestra ticEvia resembles gussata and belongs to the same general 



