444 
ZOOLOGICAL LITERATURE. 
PlIYTOPHAGA. ' ' 
General remarks : — 
Marshall has commenced (Ann. & Mag. Nat. Hist. 3rd ser. 
vol. xiii. p. 380 et seq.) a revision of the EumolpidoBi whieh^ how- 
ever, has not yet been continued. He remarks on the difficul- 
ties attending the investigation of this group, and indicates that 
these are more especially due to the imperfect manner in which 
the published genera and species have been characterized. Out 
of 59 genera indicated in the group by Chevrolat in Hejean^s 
Catalogue only 19 have been characterized, and 7 of these insuffi- 
ciently. The author gives a detailed character of ChevrolaPs 
genus Metaxyonycha [Metazyonycha, Chevr.), of which 4 species 
have already been described, viz., ^-maculata (Oliv.), granulata 
(Germ.), chlorqptera (Germ.), and testacea (Fab.). The cha- 
racters of these species, and of 10 others, including M. tricolor 
(Perty) , are given by Marshall in a tabular form, and the new 
species are described in detail. 
Marshall has published (Proc. Linn. Soc. vol. viii. pp. 24-50) 
a revision of the genera allied to Corynodes (Hope), which he 
regards as forming a subfamily, Corynodina, of the Eumolpidae. 
He gives the following character of the group and synopsis 
of its constituent genera (/. c. p. 29) : — 
Corynodina. Antennae extrorsum plus minus iucrassahe s. dilatatie, 
corpore breviores : thorax cyliudricus lateribus marginatus, verticeni supra 
occultans, plerumque post oculos utrinque sinuatus : corpus oblongum, con- 
vexurn : pedes robusti, tibiis canaliculatis, extus apice angulatim productis j 
unguiculis bilidis s. appendiculatis. 
t Antennae distincte clavatae j clavae articulis, numero 6-7, compresso- 
dilatatis. 
* Articulo ultimo apice late obtuso, rotundato . . Coi'ynodes (Hope). 
** Articulo ultimo apice acuminato Acrothinium (g. n.), 
tt Antennae baud clavatae, interdum leviter extus incrassatae, articulis nec 
valde compressis, nec dilatatis. ^ 
^ Mandibulae simplices Chrysochares (Morav.) . 
** Mandibulae bidentatae Chrysochus (Redt.). 
The species, 67 in number, are chiefly Asiatic, and this is 
especially the case with the numerous forms belonging to the 
first two genera. The second group is represented in Europe, 
Asia, and North America, but no species of it are known from 
Africa or S. America. The African species of Corynodes (in- 
cluding PlatycorynuSj Chevr.) are distinguished from the Asiatic 
by tbeir longer thorax, narrowed in front, and their more narrowly 
oblong elytra. 
Corynodes is divided by Marshall (/. c.) into seven subgenera : Plutycorynus 
(Chevr. nec Baly), p. 31; Cmynodes, p. 34; Theumorus, (Marsh.) p. 36; 
Enrycorynus (Marsh.), p. 36 ; Omodon (Marsh.), p. 44 ; Erigenes (Marsh.), 
p, 46 ; and Balhycolpus (Marsh.), p. 40. 
