1875. ] MR. A. BOUCARD ON THE GENUS PLUSIOTIS. 117 
? American Sacre, Speckled Partridge Hawk, Pennant, Arct. Zool. 
ii. p. 202. no. 96 (1785). 
Falco sacer, var. 3, Gmel. Syst: Nat. i. p. 273 (1788). 
? Falco cinereus, id. Syst. Nat. i. p. 267 (1788). 
Le Tiercelet pagard du Gerfaut, Schl. & Verst. Traité Fauc. pl. 7 
(1853). 
Falco gyrofalco, Thien. Abbild. Vogeleiern, Taf. li. figs. 3 a—d 
(1854). 
Hierofaleo gyrfalco, Bp. Rey. et Mag. de Zool. 1854, p. 536. 
Norway Falcon, Salvin & Brod. Falconry, pl. xv. (1855). 
Falco norvegicus, Tristr. Ibis, 1859, p. 24. 
Faleo gyrfuleo norwegicus, Schl. Mus. P.-B. Falcons, p. 12 (1862). 
I may here call attention to another Raptor first described by 
Forster, which Mr. Ridgway and Mr. Sharpe both seem to have 
referred to a wrong species, probably not having consulted the 
original description, as neither of them refers to Forster’s paper. This 
bird is F. spadiceus, which Forster describes as follows :—‘‘ This 
species at first sight bears some resemblance to the European Moor 
Buzzard or @ruginosus,-Linn., but is much less, and wants the light 
spots on the head and shoulders.’’ 
This description cannot be fitted to agree with Archibuteo sancti- 
johannis, to which both Mr. Ridgway aud Mr. Sharpe have referred 
I’. spadiceus as a synonym; but the species to which Forster refers 
is undoubtedly Circus hudsonius, Linn., and therefore the following 
should be added to the synonymy of this latter species, viz. :— 
Falco spadiceus, J. Forster, Phil. Trans. Ixii, p. 382 (abr. ed. xiii. 
p- 331) (1771); Gmel. Syst. Nat. i. p. 273 (1788). 
Buteo spadiceus (Forst.), Vieill. Ois. Am. Sept. i. p. 34 (1807). 
And the two latter synonyms should be erased from the synonymy of 
Archibuteo sancti-johannis. 
3. Monographic List of the Coleoptera of the Genus Plusiotis 
of America, north of Panama, with Descriptions of 
several new Species. By Apotpue Bovucarp, C.M.Z.S., 
&e. 
| Received February 16, 1875.] 
(Plate XXIII.) 
Plusiotis is a genus of Coleopterous insects belonging to the true 
Rutelide—the second group of the ninth tribe of Scarabzidze, 
according to Lacordaire. 
_ It is properly placed by this eminent author between Chalcoplethis 
and Chrysina. I say Chrysina instead of Chrysophora, because the 
latter genus is more naturally placed after Chrysina. 
It is very closely allied to the genus Pelidnota, from which it 
differs only in the mandibles being rounded outwardly, with the ex- 
tremity obliquely truncated (see Plate XXIII. fig. 2) instead of being 
bidentated (as in fig. 1). Besides, the clypeus in Pelidnota is of 
variable form according to the sex, whilst in Plusiotis it is alike in 
both sexes. 
