Famity—IPSID/. 71 
Specrss 1—SYNTELIA INDICA. Westw. 
(Trans, Ent. Soc. Lond. loc. cit. supra.) 
Puate V, Fic. 9. 
S. chalybeo-nigra, nitida; capite sparsim punctato; prothorace levi, lateribus et versus angulos posticos 
punctato; elytris tenue punctato-striatis, stria prope suturam alteraque sub humerali profundis, podice 
punctato. 
Long. corp. une. 3%5- 
Habitat ; India Orient. In Mus. Hopeiano Oxoniz (olim nostr.). 
Species 2—SYNTELIA MEXICANA. Westw. 
(Op. cit. p. 11.) 
S. precedenti simillima; chalybwo-nigra, nitida; capite valde convexo parum punctato; pronoto convexo 
in medio postice depresso, irregulariter at rude punctato, presertim versus latera et marginem posticum ; elytris 
striato-punctatis, punctisque majoribus, strias transversim conjungentibus notatis, postice punctatissimo ; meta- 
sterno impressione media ovali, lineaque longitudinali impressa. 
Long. corp. une. 3f5- 
Habitat; Mexico. In Mus. Com. Mniszech, Parisiis. 
Famity—IPSID. 
IPS CLARKANA. Westw. 
Puate V, Fic. 10. 
Nigra, nitida, elytris fulvis, maculis quatuor sutura apiceque nigris: capite fere semicirculare, punctato, 
antice obscure castaneo, vertice 4-impresso; antennis nigris articulis basalibus fulvis; mandibulis difformibus, 
intus lobo membranaceo luteo instructis, recta 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 
punctato-striatis, singulo maculis duabus reniformibus dorsalibus oblique positis, postica cum apice nigro con- 
juncta; pedibus nigris; tarsis piceis. 
Long. corp. lin. 4. 
Habitat ; Brazil (D. Rev. Hamlet Clark). In Mus. Hopeiano Oxoniz (olim nostr.). 
T have inscribed this very remarkable insect with the name of its lamented captor, from whom I received it. 
It exhibits a singular departure from the ordinary 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 difformity, that 
it is difficult to conceive how they can properly act in concert. A somewhat similar difformity occurs in 
Agathidium rhinoceros Sharp, figured in the Entomologists’ Annual for 1865, frontispiece, fig. 8. 
' A curious memoir on the asymmetrical structure of the appendages of the sexual apparatus in the North American 
Hesperide has recently been published by Mr. Scudder. 
