INSECTA OOLEOPTERA. 
191 
Sericarioi here contains the genera Serica (brunnea), with double-toothed 
anterior tibiae, nine-jointed antennae, with an elongated laminated club 
in the and somewhat truncated maxillary palpi ; Omaloplia {holso- 
sericea, Scop,, variabilis, F.), with double-toothed anterior tibiae, ten- 
jointed antennae, pointed maxillary-palpi ; Brachyphylla {ruricola, F.), 
with double-toothed anterior tibiae, nine-jointed antennae, and the hind 
margin of the clypeus depressed on each side, and, in consequence, having 
a projecting posterior angle ; Triodonta (Aquila, Dej., Lap.), with triple 
toothed anterior tibiae, indistinctly ten-jointed antennae ; and Hymenoplia, 
Esch., with triple-toothed tibiae, nine-jointed antennae, and claws fur- 
nished beneath with a membranous border. Under the Hopliarice the 
author separates the Hoplice with ten -jointed antennae, as a peculiar 
genus, Decameria, although the male alone distinctly possesses the ten- 
jointed antennae and not the female. 
Mulsanthas described several new species : Anoxia scutellaris, Chevr., 
from the South of France, resembling the australis, Sch. ; Rhizotrogus 
thoracicus, Dej. (is maculicollis, Villa, Heer) ; Rh. cicatricosus, chiefly 
inhabiting the south, plentiful at Lyons ; Rh. marginipes, Chevr., also 
in the south, especially at Bordeaux; Rh. vicinus, Dej.; Hymenoplia 
Chevrolatii, in the south of France, at Lyons, upon Festuca elatior, 
different from the Portuguese H. strigosa {Mel. strigosa. 111.) 
Heer has published a valuable treatise, “ Uber geographische Ver- 
breitung und periodisches Auftreten der Maikafer,” He here shows 
a three years’ cycle of development. Rosenhauer also asserts, for the 
Erlangen district, a three years’ period. Ratzeburg (ibid. p. 39) adduces 
his farther experience in favour of a four years’ cycle. 
Guerin (Rev. Zool. p. 6) has remarked, that several species of Rhizo- 
trogus, of Algiers, are wingless ; and, in consequence of this circum- 
stance, have peculiar habits ; he therefore proposes, that they should 
form a peculiar sub-genus, under the name of Geotrogus. There are 
four species cited, one of which is new ; Rh. Magagnoscii, which must 
have a great similarity to the Rh. dispar, only the hind tarsi of the ^ 
are thin, and scarcely longer than the tibias, while, in the rest, they are 
a half longer ; I do not know if this is the case in the other three species 
enumerated under Geotrogus; both sexes of Rh. dispar. Gory, will 
belong to this sub-genus (the same is also the case with the Rh. Gaba- 
lus, Buq., which is not mentioned) ; of Rh. Gerardii and Amphytus 
(not Euphytus), Buq. ; the females only belong to it, the males being 
true winged Rhizotrogi. 
Hope has mentioned some new species from Western Africa (Ann. 
Nat. Hist. ix. p. 495) ; Popillia sulcipennis, luteipennis, cyanoptera, 
Lepidiota Savagei, Euchlora circumcincta. 
Anisoplia theicola, Waga (Ann. d. 1. Soc. Ent. d. Fr. xi. p. 273, 
t. 11, f. 9), was found in a packet of Chinese tea. 
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