[2061] The Cleridæ, which M. Latreille has placed in the pentamerous section, vary considerably in the number of their tarsal joints. Thus in general in Thanasimus the tarsi are pentamerous; but in T. formicarius they appear to be heteromerous; and in Enoplium, Opilo, Clerus and Necrobia they are tetramerous. M. Latreille's expression, (N. Dict. d'Hist. Nat. vii. 172.) "le premier article etant fort court et caché sous le second," seems to indicate that there is a fifth joint in some of these, the first being concealed under the second; but I have never been able to discover it. Perhaps he reckoned the pulvillus as a joint?
[2062] The term heteromerous properly belongs to all insects in which the different pairs of tarsi vary inter se in the number of their joints, and it is here used in that large sense.
[2063] These three genera appear really to have only six legs, since the pedipalps or maxillary legs are not armed with claws, while the real representatives of the legs, or three last pair, are so distinguished. In Phrynus and Thelyphona the anterior pair are chelate; but in Galeodes they are pediform, as in the Araneidæ, and the great chelæ are the mandibles.
[2064] Plate [XXVI.] Fig. 47, 48. d *.
[2065] Plate [XXVI.] Fig. 49. s.. a.
[2067] Dr. Leach says there are three joints in this tribe. Nat. Misc. iii. 80.
[2068] From De Geer's description this insect seems related to Agathidium (iv. 221—. t. viii. f. 21-23). M. Leclerck de Laval discovered it to be monomerous. Règne Animal, iii. 365.