Genus Cyphononyx Dahlb. 



1 . Tibiae anticae supra spinosae. Tarsi antici 

 extus spinis 7—8 longiusculis, pectinati. Tibiae et 

 metatarsi postici spinis longioribus remotis armati. 



2. Ungnes tarsorum anticorum furcati; Uli 

 tarsorum reliquorum indivisi, sed dente armati 



Heteronyx. 



2 2. Ungues tarsorum omnium furcati (ramo 

 infero truncato) Schistonyx. 



1.1. Tibiae anticae supra inermes. Tarsi antici 

 spinis brevibus appressis instructi. Tibiae et meta- 

 tarsi positci spinis breviusculis, numerosis, in serie-. 

 bus infixis, armati. Ungues omnes furcati (ut in 

 G. Schistonyx. Cyphononyx Dahlb. 



2. Tibiae posticae serrulatae. Cyphononyx T). 



2.2. Tibiae posticae integrae. Diplonyx n. 



1. Heteronyx madecassus, n. Niger, haud puncta- 

 tus ; antennis, tibiis tarsisque ferrugineis ; capite 

 et thorace rufo-nigris, sericante-velutinis ; metanoto 

 nee tuberculato nee strigato ; tibiis sparse spinosis, 

 calcaribus longissimis ; alis rufo-aurantiis, apice 

 et posticis retro nigro-limbatis. p long. 18 mm. 



2. Schistonyx insularis, n. Niger, einer eo-hirlellus ; 

 post-scutello compresso; metanoto convexo, nee 

 strigato, nee bituberculato, nee truncato ; dbdomine 

 fusiformi, nitido; pedibus sat fortiter spinosis; 

 alis hyalinis, apice griseo-marginatis ; areola 

 cubitali 2 X quam tertia major, venam recurr. 

 1-am in medio margine excipiente; 3a ar. cub. 

 minore, venam recurr. 2-am ultra medium ex- 

 cipiente. p 10—14 mm. 



3. Schistonyx velutinus, n. — Ater, velutinus ; ver- 

 tice compresso; ocellis in declivitate frontis ex- 

 sertis ; scutello superne planato, metathorace trun- 

 cato, nee tuberculato, nee strigato; abdomine 

 sessili, basi rotundato; pedibus arete spinosis; 

 alarum areola radiali acute truncato-acuminata ; 

 areolis cuhitalibus 2a et Sa minoribus, subac- 

 qualibus,symetricis,venasrecurrentesultraniediam 

 partem excipientibus. p long. 15 mm. 



Cyphononyx Grandidieri, n. — Nigro-violaceus, 

 antennis aurantiis, scapo, capite, prothorace, 

 mesonoto, scutello pedibusque anticis obscure- 

 ferrugineis: pronoti margine utrinque transverse 

 rotundato-marginato, vel angulis subtuberciüatis ; 

 metathorace valde strigato, utrinque carinato, basi 

 bituberculato ; tibiis posticis crenato-serratis ; un- 

 guibus vix arcuatis ; alis nigro-violaceis. P long. 

 21 mm. 



• r >. Diplonyx dolosus, n. Gracilis, thorace sub- 



compresso ; mesonoto utrinque elcvato-marginato, 

 post-scutcllo tuberculato : metanoto convexo, basi 

 bituberculato, utrinque subcanaliculato et arcuato- 

 earinato, valde transverse strigato ; antennis 

 aurantiis; capite thoraceqne antice obscurc rufis, 

 thorace, postice pedibusque nigro-eyaneis ; pedibus 

 anticis rufis : tibiis posticis minute spinulosis ; 

 abdomine nigro-eyaneo ; alis ferrugineis; p cj 

 long. 12 — 18 mm. 



6. Diplonyx campanulatus, n. — Niger, gracilis, 

 nigro-pilosus ; antennis aurantiis, thorace com- 

 presso, post-scutello compresso-tuberculato; me- 

 tanoto convexiusculo, vix truncato, bituberculato, 

 tantum apice strigato ; abdomine gracili, lo seg- 

 mento infundibiliformi ; tibiis posticis compressis, 

 seriatim spinulosis; alis fasco -ferrugineis ; cyanes- 

 centibus margine apicali nigro-eyaneo. cS long. 



10 mm.. 



(ä suivre.) 



Note of the Genus Oessonia. 



By John B. Smith. 



This term was created by Messrs Grote and 

 Robinson for the Sphinx juglandis of Smith and 

 Abbot, in the Proceedings of tho Entomological 

 society of Philadelphia V. 186, and the venation 

 was figured and compared with that of Smerinthus 

 geminatus, from which it does not materially differ 

 in this respect. The antennae are said to be 

 „doubly bipectinated" in the cS, simple in the p . 

 This character is deversing of further notice, and 

 is J believe, unique in the american Sphinges. 

 It is only paralleled in our fauna in the Satur- 

 niidae. Smerinthus geminatus has the antennae 

 bipectinated in the male, a single branch to each 

 side, resombling in this character many of the 

 Bombycids and like them having the branches 

 ciliate. In Cressonia cS each Joint has two branches 

 to each side of each Joint as in Satumia, the 

 branches also ciliate. In fact it would be difficult 

 to distinguish the antennae of Cressonia from that 

 of Satumia. Another character proving the strong 

 Bombycid affinities of this genus is found in the 

 fronelum which is wanting in the p and very 

 much redticcd in size in the male. 



