12 
NEW GENUS OF LOCUSTS. 
leaf. No other instance of this kind of analogy occurs to ray recol¬ 
lection amongst the Locustidse, although it is of constant occur¬ 
rence amongst the grasshoppers with long antennae. 
From the very compressed form of the body (another remarkable 
character) the genus may be named 
SYSTELLA, W. 
Corpus compressissimum. Caput ante oculos et inter antennas productum, 
facie valde obliqua convex a integra sc. haud carinata. Clypeusdistinctus. Labrum 
antice in medio fissum. Palpi breves filiformes, labiales minores. Antenna 
secundum sexum for mm variic; in fossula tuberculi frontalis utrinque inserts, 
articulis 2bus basalibus distinctis, sequeutibus 4 aut 5 arete coalit is, deplanatis mar- 
gine interno crassiori, externo acuto, in q multo latioribus ; articulis reliquis 
distinctis gracilioribus (in £ multo Jongioribus), apicali attenuato. Prothorax 
compressus, dorso piano integro, lateribus angulatis. Prosternum tuberculo acuto 
armatum. Abdomen compressuin alis brevius, seginento ultimo ventrali in £ 
maximo inflato. Pedes 4 antici breves, *2 postici saltatorii; tibiis serie duplici 
spinarum sequalium extus armatis ; tarsi 3-articulati unguibus acutis, pulvillo 
magno. Tegmina magna foliiformia, supra dorsum horizontaliter elevata, angulo 
externo antico emarginato. 
This genus appears to me, from the structure of its antennae, to 
be most nearly allied to Akicera and Porthetis, Serville, (Pam- 
phagus, Bunn.,) and to Xiphicera. From these, however, as well 
as all the other genera of the family, it is separated by the peculiar 
characters above noticed. 
Species I. — Systella Rafflesii , W. Luteo-viridis, tegminibus viridibus latissimis , 
ocello magno fusco in area costali notatis. Long. corp. £ lin. 13 £18. Expans, 
tegmin. lin. 34£. 
Antennas 15-articulatee in £ y 14 in $ ; articulis 3—7 in £, 3—Gin $, coalitis dilatatis 
subprisraaticis, in $ multo latioribus, 8 reliquis in £ fere equalibus et filiforinibus, in $ 
vero articulis 7 et 8 sensim angustatis, Teliquis 6 distinctis irrcgularibus. Vena postcostalis 
tegminum ramos 5 simplices punctatos emittit; vena meuiana duos tantum. Apex 
margin is costalis in $ valde, in £ parum, cmarginatus. Tibiae 4antic® fusco-annulatte. 
A single female specimen of this species is in the collection of 
the Zoological Society, and was presented by Sir Stamford Raffles, 
by whom it was most probably collected in Sumatra. I also 
detected a male in the collection formed by H. Cuming, Esq., in 
the Philippine Islands, and destined for the British Museum. 
Species II. — Systella Hopei, W. Fusca, tegminibus fusco luleo albidoque variis, angtis- 
tioribus; emarginatura apicali marginis antici vLv conspicua. Expans, tegmin. lin. 35. 
Praecedenti multo tenuior, fusca, dorso protboracis et capitis scabro, linea tenui fulva 
inter oculos ; antenna? ( £?) 17-articulatac, articulis 11 ultimis distinctis longitadine decres- 
centibus, lutcis. Tegmina luteo-fusca nubila magna media (albido poslied cincta) ad 
costam angustata maculisque quadratis minoribus marginis postici fuscis, venis punctatis 
punctisque nonnullis majoribus inter venas. Abdomen et pedes postici mutilati. 
This species is unique in the collection of the Rev. F. W. Hope, F. R. S., &c., and 
is a native of China. 
The plant figured is the Indian Ceropegeia Juncea. 
