. Cuvier's animal kingdom : arranged according to its organization. Animals. 580 T. lucifugus &nA flavicollis inhabit the south of France, living- in the interior of trees. The exotic species have been but imperfectly characterised, Linnaeus having confounded several under the name of T. fatale. Etnhia, Latr., comprises several insects allied to Teiines, butvvith the head larger than the thorax ; tarsi 3-jointed ; wings scarcely extending lieyond the abdomen. [See my monograph on this exotic genus, published in Transac- tions of the Liniicean Society/ of London.] The other Termit
. Cuvier's animal kingdom : arranged according to its organization. Animals. 580 T. lucifugus &nA flavicollis inhabit the south of France, living- in the interior of trees. The exotic species have been but imperfectly characterised, Linnaeus having confounded several under the name of T. fatale. Etnhia, Latr., comprises several insects allied to Teiines, butvvith the head larger than the thorax ; tarsi 3-jointed ; wings scarcely extending lieyond the abdomen. [See my monograph on this exotic genus, published in Transac- tions of the Liniicean Society/ of London.] The other Termitines have the tarsi 2-jointed ; the labial palpi indistinct, or very short ; the antennae about 10-jointed ; the first segment of the thorax very small, and the hind wings smaller than the fore ones. They form the genus Psocus, Latr. {Termes, Hemerobhis, Fabr.), Tliese are insects with a short, soft, and gibbose body; the head large ; the anteimœ setaceous ; wings roof-like, and but slightly veined. They are very active, and live on the bark of trees. We generally find in books of collections of plants, the P. pulsatoriits, of a whitish colour, and which has been believed to produce the slight noise like the ticking of a clock, often heard in houses, whence its specific name. 5. The Perlides, which have three joints in the tarsi, the mandibles almost always membranous and small, with the hind wings broader than the fore wings, and folded at the inner edge. They consist of the genus Perla, Geoff.,— In which the body is elongate, narrow, and flattened ; the head rather large; antennae setaceous ; prothorax nearly square ; the wings shutting horizontally on the body ; and the abdomen generally terminated by two setae. Their larva; are aquatic, and are stated [by Latreille, but erroneously,] to reside in cases which they bear about with them. [They are naked, and resemble the imago, but are wingless.] Perla bicaudata, Linn. (Phryganea), is a rather common species, found on the m
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