( 52) 



not from aieolc; middle part of discocelliilar veiulets between veins o and is 

 obliterated in our specimens, or is at least so feeble that 1 cannot see it under a 

 strong lens. 



Two female specimens of Ilecateaia feneslrala in our collection, and a specimen 

 of this sex of thyrkUmi in Mr. Herbert Druce's collection, show that the 

 neuration in Westwood"s ligure of the female of B. Ihyridion (I.e. t. 33. f. 4) is 

 so far correct, as vein 10 arises from the areole and 8 and 9 are stalked together. 



The antennae of Ihyridion Boisd. are much more pointed than those o( fenentrata 

 Boisd. ; the terminal joint of the palpi is longer and naked. The terminal joint of 

 the palpi offenestrata is much too short in We.stwood's figure. 



Hecateitia Boisd. is placed by Kirby in his Catalogue at the end of the Castniidae ; 

 in this Kirby follows Westwood, I.e., who pointed out, in opposition to Boisduval, that 

 Jlecatesia was much more nearly allied to Castnia Fbr. than to Eusemia Dalin. and 

 Aegocera Latr. Westwood was, however, entirely wrong, and Boisduval, Druce, 

 Hampson, etc., were and are right in treating Hecatesia as an Agaristid. Hecatesia 

 disagrees with Castnia nearly in every respect, while there is nothing in its structure 

 which might justify one in removing it from the typical Agaristids. 



The American insect described by Druce &■> Hecatesia falcaia, Biol. Centr. Amer.. 

 Lep. Net. I. p. 35. t. 5. f. 23 (<J). 24 ( ? ) (1883) (Panama), mu4 certainly be referred 

 to another (new) genus. .Xs we have, however, no females of this falcata, 1 abstain 

 from proposing a genus for it, but give the following note on the structure 

 of the male : — 



Differs from Ileeatesia Boisd. as follows: terminal joint of palpi shorter; 

 antennae gradually thickened, much less abrui)tly clubbed; all the tibiae clothed 

 with long hairs; hinder wings with the abdominal region dilated (recalling the 

 hindwing of Evjjloea). 



Xeuration : areole short and extremely narrow; vein 10 from areole, not stalked 

 with 9; veins 8 and 9 stalked together; second partition of median nervure twice as 

 long as the respective portion of the outer margin ; same partition on hindwings 

 longer than lower discocellular veinlet. As the veins near the anterior angle of the 

 cell to the forewings are so close together that a simple woodcut would not give 

 a right idea of the position of veins 10, 9, 8, and 7, and the form of the inconspicuous 

 areole, we propose to give a figure of the venation on one of the plates of this joiuiial 

 when an opportunity occms. 



The stridulating organ on the forewings of H.fulcala Drnce is scaled on either 

 side of the wing. K. ,1. 



Ha;ise, Iris I. p. 323 (1888), says of the peculiar organ on the forewing of the 

 male of II. fenestrata J5oisd. that probably in the live specimen the thickened costal 

 margin approaches the scaled portion of the wing by means of the vitreous membrane 

 being depressed, and that it is removed by the wing being excessively spread out 

 when the specimen is set. This is erroneous ; unset specimens have the vitreous 

 mark the same as set specimens. Haase, regarding this stridulating organ as being 

 a scent-producing one,_ had to find a fold for sceut-producing scales. K, .T. 



i. American forma with vein 10 of the forewings arising from the areole. 



Agarista sabiclosa. Feld. from California and A. noctuiformis Moschl. from I'orto 

 Rico, both with (?) under Metagarista in Kirby 's Catalogue, are very closely allied if 



