( I'J-i ) 



never quite constant : for examiil<\ in two specimens of X. raarmorea the number of 

 millimetres of the length of the cell and the length of the wing are respectively 

 14 and 26, and 14 and 271 ; in Asota pku/iata, 10 and 21, and 8 and 19 ; in Anota 

 la^mta, 10 and 22, and 9i and 20. 



The second character mentioned by Snellen is of great importance, as that part 

 of the striduluting apparatus, as well as the fold before the cavity of the forewing, 

 are essentially different from the apparatus of Asola. 'i'he patch referred to by 

 Snellen stands at the apex of the cell on the hiudwing above, is rather sharply 

 defined, and consists of enlarged, rounded, thick scales, the surface of which mostly 

 has seventeen stripes ; the spot has a glabrous, not a " viltachtig " appearance (I'l. IV. 

 fig. 45, one of the scales, N. bhawaim). In Asota the corresjwnding mark is elongate, 

 smaller than in Xeochera, and stands immediately behind the costal nervure (PI. IV. 

 fig. 41); the scales composing it are larger than in Xeocltera, and have usually 

 thirty-five stripes (PI. IV. fig. 44). 



The fold in front of the cavity on the forewing below is narrow, and clothed 

 with strong, enlarged, yellowish scales, which are rounded at the apex and cover one 

 another for the most part, as shown on PI. IV. fig. 39 (X nujenia). The fold with 

 these strongly chitinised and striate scales produces a sound by friction upon the 

 scales of the before-described mark on the hindwing. 



The scales between the costal margin and the middle of the cell of the upjierside 

 of the hindwing of Xeochera are elongate, being at least four or five times as long as 

 broad, while in Asota that portion of the wing is covered with short rounded scales 

 which are scarcely half as long again as broad and slightly resemble the scales of the 

 stridulatorv patch. Just before the costal nervure, in the basal half of the hindwing, 

 there is in Asota a streak of (mostly yellowish) hairlike glandular scales, corresponding 

 to a similar streak behind the submedian vein on the underside of the forewing ; 

 neither streak is developed in Xeochera. 



Contrarv to all species of Asota I could examine, the harpe of Xeochera is very 

 slender and long (PL IV. figs. 28, 29, 30). 



Besides the cell of the hindwing being usually longer than in Asota (see above), 

 there is very little in the neuration to distinguish Xeochera by. The free apical 

 portion of the areole is in Xeocltera shorter than the basal portion, while in Asota the 

 reverse is mostlv the case. Vein 11 of the forewing stands in Xeochera farther away 

 from the apex of the cell than in Asota, the basal portion of the costal vein to the 

 hindwing is weaker than in Xeochera, and the same portion of the subcostal nervure is 

 mostly stronger than in Asota. These differences are, however, by no means constant. 



flie upper- and underside of tlie thorax, especially the tegulae, as well as the 

 coxae, are in Asota clothed with long hairs, which give these parts of the body a 

 woolly appearance. In all Xeochera the upperside of the thorax is covered with 

 relatively short scales, which do not conceal the outline of the tegulae ; in X. dominia 

 and emjenia also the underside is scaled, and the scales at the sides of the sterna and 

 in front of the anterior coxae are very Iwoad and rounded, while in inops the scales 

 before the anterior coxae are longer and partly hairlike. The sterna of X. -nmrmorea 

 appears to be hairy, but the hairs are dilated at the ai)ex, exclusive of those at the 

 edges of the epipleurae, and differ in this from the hairs on the sterna of Asota. 



The scaling of the wings of Heterocera is said by Kettelhoit, Sclmeider, and some 

 others, who have compared the scales of various families, to differ from the scales of 

 RhojKilocera in being generally without a basal sinus, which is always present in 

 the greater jiortion of the wing-scales of Rhopaloccra. Schneider mentions only 



