97 On the Genus Dyschorista, Led. 



synonyms of 0. cynica, of which they are in fact slight 

 varieties ; 0. infirma, however, is a Brazilian species, and 

 must be expunged from the North- American fauna, the form 

 described by M. Guene*e as var. A being, as he supposed, a 

 distinct species. 



In typical 0. infirma the secondaries of the male are creamy 

 white u Ailes infer, d'un blanc-jaun&tre " whereas in the 

 northern form they are of the same glossy brownish grey as 

 in the female. In the Brazilian insect the inner line of the 

 central area of primaries is more oblique and much more 

 irregular and the outer line more distinctly sinuated between 

 the nervures j both of these lines and the edges of the dis- 

 coidal spots which they enclose are much less prominent than 

 in the northern form ; but, as M. Gue'ne'e says, the subter- 

 minal line is clearer, at any rate it is so in the female ; the 

 marginal spots are very indistinct, and are thus overlooked in 

 the original description of the Brazilian form ; but in that of 

 var. A the pale zigzag line which shows them up in the 

 northern form is noted : " Un feston terminal clair tres- 

 inarque*." I propose to give the North- American species the 

 new designation of Dyschorista crenulata. 



Four closely allied Brazilian species are in the collection, 

 all differing more or less in the clothing of the under surface 

 of the primaries, the tufting of the anal extremity in the 

 males, or the palpi; one of these is typical 0. infirma, a 

 second may be 0. rubor, but the discoidal spots are bor- 

 dered by a pale line, whereas in GueneVs type (a female) 

 they were not a third I am unable to recognize from any of 

 the descriptions ; it is a male with closed anal claspers, 

 giving it the aspect of a female the costa of the primaries is 

 distinctly arched towards the base ; the under surface of these 

 wings almost wholly covered with dense rough hair, which 

 extends also to the basicostal area of secondaries ; the colora- 

 tion and general pattern is that of Dyschorista crenulata, but 

 the " orbicular " spot is rhomboidal, the two outlines of the 

 central area are indistinct and much more parallel, and the 

 pale crenulated submarginal line is wanting ; the pectus and 

 femora are also much more hairy. I propose to call this 

 Dyschorista lanaris. The fourth species of the same group is 

 O. curvirena a most remarkable insect, in which the palpi 

 are curved upwards like those of a Deltoid and the anal tufts, 

 when fully expanded, are seen to be enormously developed. 

 The genus seems to abound in extraordinary ornamentation ; 

 in D. melanogaster M. Guenee says, " Abdomen noiratre en 

 dessus, garni lateralement de poils carnes, a 1'extrdmite d'une 

 brosse jaun&tre," which calm description hardly prepares one 

 for the large expanded rose-coloured brushes of the moth. 



