25 



an inch fnjni the shoulders, and a faint line which runs from the tips to the middle of the posterior 

 edges. 



Under Side. Legs, sides, thorax, and abdomen dark orange. Wings with a faint narrow bar crossing 

 them near tiieir external edges, dividing the wings into two partitions ; the lower ones beino- of the 

 same colour as on the upper side, but those above the bar are of a yellowish fox-colour. Margins of 

 the wings entire. 



It is questionable whether this figure represents the Phalsena senatoria or pellucida of 

 Abbot and Smith, by whom the transformations of both species have been illustrated ; 

 Smith citing Drury's figure with doubt, as bclong-ing to pellucida. I have much pleasure 

 in adopting the present well-marked genus proposed by Dr. Thaddeus W, Harris, one of 

 the most distinguished American entomologists, in the appendix to the work above referred 

 to ; and respecting which I am indebted to that gentleman for the following communi- 

 cations : — " The male of Dryocampa senatoria, of Abbot and Smith, has the basal half of 

 the antennae pectinated on both sides, and the apex simple, as in Bombyx (Cerocampa, 

 Kirby ; Ceratocampa, Harris's Cat.) regalis and imperialis ; and as they are described to 

 be in the genus Zeuzera. The larvae are naked, striped, rigid, with acute tubercles, and 

 two thread-like horns on the second segment. They devour the leaves of forest trees, 

 particularly oaks, and enter the earth to become pupae. The edges of the segments of the 

 pupae are denticulated. On account of these peculiar characters, I have ventured to assign 

 to this a new generical name ; under which will be included also Bombyces pellucida, and 

 Stigma, Fabr., figured in Abbot and Smith's Lepidopterous insects of Georgia ; together 

 with B. rubicunda, F. all of which are now found to inhabit Massachusets." 



In addition to the characters mentioned by Dr. Harris, the peculiar form of the 

 posterior wings of the males of these moths may also be noticed, and which are of a trian- 

 gular form, somewhat like those of Erycina menetas (see vol. 3. pi. 8. fig. 3.), but extendino- 

 to the extremity of the abdomen. This genus is not far removed, in its natural affinities, 

 from that of Ceratocampa, (see vol. 1. pi. 9.) 



JilGOCERA AMABILIS. 



Plate XIII. fig. 3. 



Order: Lepkloptera. Section: Crepuscularia? Family: Sesiidje, Steph. 

 Genus. jEgooera, Latr. Boisdiwal. 



^GOCEBA Amabilis. Alis anticis rufis, maculis (nigro marginatis) margineque interne, atbidis ; posticis fulvis 



maculi discoidali margineque postico uigris. (Expans. Alar. 1 unc. 6 lin.) 

 Syn. Phala;na (Noctua) Amabilis, Drurij, App. vol. 2. 



^gocera Amabilis, Boisduval Hist. Nat. Lepid. pi. 10. B./. 6. 

 HABiT.iT : Coast of Guinea. 



Upjje/- Side. Head brown. Antennae filiform. Thorax and abdomen yellow brown. Superior 

 wings fine darkish red, with several yellow spots thereon of different shapes, each encircled with black ; 

 the posterior and external edges having yellow margins. Posterior wings deep yellow, inclining to 

 II E 



