COLEOPTERA. 



541 



Our second general division of the genus Curculio of Fabricius differs in the narrowness of the mentum, which, 

 from not occupying the whole breadth of the oral cavity, leaves the sides of the maxillae and mandibles (which 

 are toothed) exposed ; the club of the antennas is formed of live or six joints. 



Those with only two teeth in the mandibles, and the labial palpi distinct, and which are destitute of wings, com- 

 pose the sub-genera Myniops, Rhytirrhinus (which have simple tarsi), and Liparus (which has pulvillose tarsi). 

 Those which have wings form the sub-genera Hypera ami 1/ytobius. Those with three or four teeth in the mandi- 

 bles, and the labial palpi nearly obsolete, form the subgenus Cleonus, including various other genera of Schonherr. 



The Longirostres, or those with the antennae inserted at a distance from the insertion of the man- 

 dibles, often near the middle of the rostrum, which is generally long, nearly correspond to the genera 

 Lixus, Rhynchamus, and Calandra, Fabr. In the first two the antennae are at least 10-jointed, but often r 

 Ll-or 12-jointed ; the club being at least composed of the last three joints. 



Lixus, Fabr. — 



Nearly resembles Cleonus in the trophi, the long fusiform club of the antennae, the narrow elongated form of the 

 body, and the armature of the feet. It is nearly linear in L. paraplecticus [a common British species], the larvae of 

 which live in the stems of Phellandrium, and produce in horses which may happen to cat them [with the plant], 

 the disease called " paraplegie." 



Rhinocyllus, is composed of a species with the antennas scarcely elbowed, and which, from its supposed efficacy 

 in the toothache, [has been specifically named R. anti-odontalyicus]. 



Rhynchjenus, Fabr. — 

 Has not such general characters. In some the sternum has not a cavity for the reception of the rostrum ; and of 

 these spme have the antennae 11- or 12-jointed, and the legs not fitted for leaping. 



Thamnophilus, is winged, the antennae short and scarcely elbowed, and the tibiae armed with a strong hook at the 

 tip. 



Bayous, has the tibiae curved, with a strong hook at the tip ; the tarsi long and filiform. These are small insects, 

 found in marshy places. 



Brachypus, differs from the last in having the penulti- 

 mate joint of the tarsi very much dilated; the last joint 

 sometimes without claws. 



Bala 11 in us, has the rostrum very long, sometimes longer 

 than the whole body. B. miciim [the common Nut Weevil], 

 the larva of which feeds on the kernel of the nut. 



Rhyncfueniu, differs from the preceding by negative cha- 

 racters ; and from the following by having 12-jointed an- 

 tennae. 



Sibynia, having only 11-jointed antennae; the club com- 

 posed of seven. 



Myorhinus, differs in having no wings. Many of Schon- 

 herr's genera are here united together. 



We now pass to those which have only nine or ten joints 

 in the antennae, and are able to leap. 



Clonus, Clairv., has the body nearly globular, but they do 

 not leap. The following are able to leap, having thick hind 

 thighs. 

 [Many minute British species.] 



pi~ 79.— A, a branch of the filbert tree ; a, a healed wound caused 

 By the introduction of the epi: of the nut weevil ; h, extremity of 

 the on' ; ' . ''m' hole oftbe ijrnh ; b. the ktuIi <■( the nut weevil ; 

 c, the pupa of the .same ; D.the perfect insect [Balaninui nucum.) 



Orchestes, has the antennae fixed upon the rostrum. 

 Ramphus, has the antennae fixed between the eyes. 



In the remaining Ithynchaeni the legs are apart at the base, and the sternum has a cavity for the reception of the 

 rostrum. 



In Amerhinus and Baridius, the latter is however wanting. 



Those which possess this cavity have been distributed into a very great number of genera by Schonherr. 



Camptorhynrhus (Kurhinus, Sen.), differs in having the terminal part of the antennae forming a thick perfoliated 



mass. 

 Centrinui, has the scutellum distinct, the club of the antennae elongated, and the prosternum witti tun spines. 

 Zygopt, has the eyes united above, and the legs very long. 

 ( 'eutorkynchut, has the scutellum scarcely visible, the antennae 12-jointed. 

 Bpdaticus, lias 11-jointed antennae. 



Oiobites, has the body very short and sub-globose, the antenna? 12-jointed. 



Cryptorhynchtu, has Che body oblong-conves \ the fore-legs longest, especial]; in the males ; antenna; 12-jointed. 

 Tylodcs, is apterous or sub-apterous, with the scutellum wanting. 



• Calamdr \. flab. — 

 Comprises the terminal Longirostres which have <"ii> nine joints to the antenna!, the last, or the two last, forming 



the club, with the tip Spongy. They feed In thi' larva stair nn seeds or " I\ BUDStSJ 



Anchonut, Sen. (with 10-jointed antenna), and 



Orthochcctet, Germ, (with 9-jointed antenna?), an- both apterous. 



