468 INSECTA MADERENSIA. 



Var. u. fere uiger, prothorace ad latera sola pallido, elytris distincte biarcuatis. 



Var. /3. brunneo-niger, prothorace pallido in disco obsolete bisignato, elytris distincte biarcuatis, 



inter arcus plus miuusve rufescente-castaneis et basi in medio nigrescentibus. 

 Var.y. brunneo-niger, prothorace in disco nigrescente (i.e. signis conflueutibus), elytris latissime 



pallido- arcuatis (i. e. arcubus confluentibus) et basi in medio nigris. 

 Var. S. ut var. y, sed prothorace in disco bisignato. 



Var. s. supra omnino pallidus, prothoracis signis elytrorumque arcubus vix observandis. 

 Long. Corp. lin. J. 



Coccinella arcuata, Eossi, Maiit. Ins. ii. 88 (179i). 



, Schon. Si/n. Ins. i. 2. 207 (1808). 



Scymnus arcuatus, Mulsant, Se'curip. de France, 245 (1846). 



Habitat in hortis circa Funchal, a vere novo usque ad autumnum vulgaris : in rineto Loweano ad 

 Levada super folia Duranta Plumieri, necnon in horto Ecclesiee Anglicanse (etiam in ipsa ui-be), 

 supra Musam paradisiacam copiosissime observavi. 



S. more or less brownish-black, and pubescent. Prothorax either entirely pale, or else more or less 

 dark upon the disk. Elijtra with two pale concentric arcs on the hinder cUsk, common to both 

 (their concavities being turned towards the scutellum) ; the space between the scutellum and the 

 inner of these curves always darker than the rest of the surface, and in most of the varieties, 

 except the extremely pale one {var. s), black, and generally bipartite behind; the arcs themselves 

 very often confluent, in which case they form a single pale arch, exceedingly broad, — in other in- 

 stances the space between them is more or less chestnut, or rufescent, varying greatly in shade 

 and intensity : the extreme margin of the elytra towards the apex, with the antenius and leys, 

 always pale. 



Var. a. nearly black, with the edges of the prothorax alone pale; and the arches of the elytra 

 exceedingly distinct. 



Var. /3. brownish-, or chestnut-black ; the prothorax pale, with only two small (and very obscure) 

 sjjots on the disk darker. Elytra with the arches distinct, but the space between them more 

 diluted, or rufescent, than in var. a. (Apparently the tyi)ical Madeiran state.) 



Var. J. brownish-, or chestnut-black. Prothorax with a rather large and dark patch upon the disk 

 (the two spots being confluent) ; and the elytra with the jjalc arches also confluent, forming a 

 single postmedial curve, — exceedingly pale and broad. 



Var. 8. like var. y, but with the dark patch on the disk of the prothorax again resolved into two 

 obscure spots (as in var. /3) . 



l^ar. e. altogether pallid above, — the two prothoracic spots, and the arches of the elytra, being 

 almost evanescent ; the former nevertheless are just perceptibly dai-ker, and the latter very faintly 

 paler, than the surrounding surface. 



Also a very inconstant insect, yet at the same time receding so completely from 

 the other Scyrnni here described, that there is but little fear of confounding it with 

 any of them. The two pale concentric cm'ves indeed with which its elytra are 

 adorned (and which even when suliused into a single broad one do not lose then- 

 arcuated shape), in conjimction with the almost invariably darker region enclosed 

 by the inner of these loops at the base of the suture, and, in every instance, the 



