7 0 OEÜBE—COLEOPTERA. SECTION—PENTAMERA.
FAMILY—COLYDIIDYE.
GENUS—APBOSTOMA. Guérm-Méneville.
(Giiérin-J/Iéireville, Eev. Zool. 1839, p. 171.)
The type of this genus inhabits Madagascar, and was, in 1842, in the Collections of Messrs. Reiohe and
Gnérin-Méneville, the latter of whom, in 1842, allowed me to make a careful figure of it, and who considered it
to be allied to Calodromus among the Brenthidoe, and to Colydium. The former relationship is due only to the
very elongate and slender form of the insect. The latter is its genuine affinity, as is proved by the structure of
t h e different par t s of the mouth.
SPECIES 1—APEOSTOMA FILUM. Guérin-Méneville.
PLATE V, FIG. 7.
' Cylindrique, noir luisant, palpes fauves^ antennes et tarses bruns ; tête lisse, carrée sur les côtés^ profondement
échanerée en dessus et en avant ; corselet lisse un peu rétréci en arrière, au moins trois fois plus longque
la tête, ayant un petit sillon longitudinal au milieu ; élytres deux fois plus longues que le corselet, très peu
rétrécies au milieu, Animent striées, terminées en arrière par des carènes élevées dont les deux supérieures le sont
plus que les latérales et circonscrivent im espace aplati et sillonnée ; dessous Uniment ponctué.'
SPECIES 2—APEOSTOMA PLANIFBONS. Westw,
(Trans. Ent. Soc. Lend. 1869, part iv. p. 320.)
PLATE T, FIG. 8.
A. filiforme, cylindrieum, nigrum, nitidumj capite subquadrato, supra plano, glabro, margine omni verticis
acute elevato ; antennis apicem versus sensim sed paullo crassioribus, et prothorace e quarta parte brevioribus ;
prothorace crebre punctato, linea media longitudinali impresso ; elytris striis impressis punctatis notatis, linea
elevata e medio utriusque ad apicem estensa.
Long. corp. lin. 5.
Habitat ; River Niger, Africa. In Mus. Hopeiano Osonias.
F A M I L Y — T R O G O S I T I D I E .
GEITOS-SYNTELIA. Westw.
(Trans. Ent. Soc. Lond. Proc. 3rd Ser. vol. ii. p. 11, March, 1864.)
Insecta Platycerum carahoìAem simulantia. Corpus oblongum, subdepressum, glabrum ; caput porrectum,
subquadratum ; mandibulie magnte porrecta;, intus ii-regulariter dentata; ; maxillas bilobiE, lobis simplicibus
longe oiHatis, interno brevi ovalij externo elongato ; palpi omnes subfiliformes articulis externis asqualibus ;
mentum subquadratum; labium setosum profunde incisum ; antenniE in fossulis obliquis faciei infera; recepta;,
breves, 11-artieulata;, subgenieulatoe, clava magna, depressa, ovata fere solida, 3-articulata ; prothorax capite
paullo major, subquadratus, tenue marginatus, antice parum latior, angulis anticis rotundatis ; tibia; omnes extus
spinosa;; tarsi simpliees o-artieulati, articulo ultimo elongato clavato ; presternum ante coxas anticas promincns ;
abdomen 5-articulatum articulis tribus intermediis brevioribus.
FAMILY-IPSID7E. 71
SPECIES 1—SYNTELI A INDICA. Westw.
(Trans. Ent. Soc. Lond. loc. clt. supra.)
PIATE V, Fio. 9.
S. ehalyba;o-iiigra, nitida; capite sparsim punctato; prothorace lo3vi, lateribus et versus ángulos posticos
punctato ; elytris tenue punetato-striatis, stria prope suturam alteraque sub humerali proftmdis, podice
punctato.
Long. corp. une.
Habitat ; India Orient. In Mus. Hopeiano Oxonia3 (olim nostr.).
SPECIES 2—SYNTELI A MEXICANA. "Westw.
(Oj;. cit. p. II.)
S. pra3cedenti simillima; chalybieo-nigra, nitida; capite valde convexo parum punctato; pronoto convexo
in medio postice depresso, irregulariter at rude punctato, prsesertim versus latera et marginem postieum ; elytris
striato-punctatis, punctisque majoribus, strias transversim eonjungentibus notatis, postice punetatissimo ; metastemo
impressione media ovali, lineaque longitudinali impressa.
Long. corp. une. y"^.
H a b i t a t ; Mexico. In Mus. Com. Mniszech, Parisiis.
FAMILY—IPSID^.
I P S CLAEKANA. "Westw.
PLATE V, FIG. 10.
Nigra, nitida, elytris fulvis, maculis quatuor sutura apiceque nigris : capite fere semicireulare, punctato,
antice obscure castaneo, vertice 4r-impresso; antennis nigris articulis basalibus fulvis; mandibulis difformibus,
intus lobo membranaceo luteo instructis, reeta longa, valde falcata acutissima, sinistra breviori minus curvata,
apice acuto margine interno in medio dente conico armato; prothorace transverso, lateribus tenue marginatis et
rotundatis, intra marginem utrinque fovea submarginali, discoque 4-impresso ; elytris leviter punctatis et
punetato-striatis, singulo maculis duabus reniformibus dorsalibus oblique positis, postica cum apice nigro conj
u n e t a ; pedibus nigris ; tarsis pieeis.
Long. corp. lin. 4.
H a b i t a t ; Brazil (D. Rev. Hamlet Clark). In Mus. Hopeiano Oxouia; (olim nostr.).
I bave inscribed this very remarkable insect with the name of its lamented captor, from whom I received it.
I t exhibits a singular departure from the ordinaiy law of bilateral symmetry which is found so extensively to
prevail amongst insects'. It is true, that, when any two organs have to act in opposition to each other, their
parts must be fitted to meet for action ; thus, if one is hollowed out in a particular part, the other must be
dilated to fit into such excavation : but here we find the mandibles exhibiting so remarkable a diiformity, that
it is difiicult to conceive how they can properly act in concert. A somewhat similar difformity occurs in
AgatUdmm rlimoceros Sharp, figured in the Entomologists' Annual for 1865, frontispiece, fig. 8.
' A cm-ious memoir on the asymmetrical structure of the appendages of the sexual apparatus in the North iVmerican
IlesperidiB has recently been published by Mr. Scudder.
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