54 INSECTA. 



i 



Apoderw, distinct by the head affixed to the thorax by a rotule. 



Abu.s, Has the head immersed to the eyes in the thorax. 



Rhynchites, has the proboscis dilated at the tip, and the abdomen nearly square. 

 R. Bacchus [a splendid but very rare British species], lives on the vine, the larvae 

 inhabiting the rolled-up leaves, which it devours, and thus sometimes commits 

 gTeat damage. 



Apion, Herbst., has the body pear-shaped. See the monographs of Germar and 

 Kirby, in Trans. Linn. Soc, vol. xii. [Some of the species do much damage, 

 devouring the seeds of clover.] 



Rfiinotia, Kirby [Belli*, Sch.], has the body almost linear, and the antennae 

 thickened, but not clubbed. 



Eurlthius, Kirby, has the antennae terminated by a long mass, the last joint 

 being greatly elongated in the males. 

 Fie. 7"-— i. Attciabui enrevilonoidu i Tubicenus, Dej. (Auletes, Sch.), has the antennae terminated by a perfoliated 



2 Ap'Mlerus avellanie ; 3. Ubyncbites , , , , ... 



cavifrons. mass, and the abdomen is oblong. 



Those which have the antenna; filiform, with the last joiut alone forming the mass, the proboscis 

 often longer in the males than in the females, and often differently terminated, and always stretched 

 out in front, the body elongated, and the penultimate tarsal joint bilobed, compose the genus — 



Brentus, Fab. (Curculio, Linn.) 



These insects are peculiar to warm climates. Some of them, which have the body linear, and the antennae filiform, 

 and 11-jointed, form the subgenus 



Brentus proper, I,inn.,whichhas been greatly cut up by Schonherr. From the statements of Savi andLacordaire, 

 it appears that these species are always found beneath the bark of trees ; the only European species is the Brentus 

 italicus. 



Ulocerus, Schon., has the body linear, and the antennae 11-jointed. 



Cylat, Latr., has only 10-jointed, and the thorax nodose. 



Sometimes the antennae are distinctly elbowed, the basal joint being much longer than the following. 

 These form the genus Curculio, Linn. 



We divide them into Brevirostres and Lonyirostres, according as the antennae are inserted — near the 

 tip of the rostum, close to the mandibles, — or further back, either near the middle or at the base. 



The Brevirostres form, according to Fabricius, two genera, [Brackycerus and Curculio]. 



Brachycerus, Fabr.— 

 Has all the joints of the tarsi entire, without cushions beneath ; the antennae are short, scarcely elbowed, and only 

 9-jointed, the last forming the mass ; they want wings ; the body is very rugose, or unequal. They are peculiar to 

 the south of Europe and Africa, living on the ground in sandy places, and appearing early in the spring. According 

 to M. Cailliaud, the Ethiopian women suspend one of the species round their necks as an amulet. 



Curculio,— 

 Has nearly all the under-side of the tarsi cushioned, and the penultimate joint bilobed. The antennae are 11 

 or 12-jointed, comprising the false joint by which they are sometimes terminated. Although here much more re- 

 stricted than in the Linnaean system, this genus comprises an immense number of species, particularly described 

 by Schonherr and Germar, who have greatly divided it. They may be divided, according to our own observations, 

 into two principal divisions. 



1. Those in which the mentum, more or less orbicular, occupies all the oral cavity, and hides the maxillae and 

 mandibles, which are not distinctly toothed. 



Cyclomus, (including Schenherr's Cryptops, Deracanthus, and Amycterut), has the tarsi not pulvillose, and the 

 penultimate joint scarcely bilobed. In all the rest the tarsi are pulvillose, and the penultimate joint bilobed. 



Curculio proper (including a very great number of genera of Schonherr), is winged, and has the lateral impres- 

 sions of the rostrum oblique, and directed downwards ; the fore legs scarcely differ from the rest. The South 

 American species, forming the genera Entimus, Chlorima, &c, are remarkable for their splendour, and often for 

 their size. The Diamond Beetle, (Curculio imperialist is one of them. Other small species peculiar to our climate, 

 of a much smaller size, but scarcely less splendid, [especially under a lens,] and of a silvery or green colour, form the 

 genus Polydrusus, Schonherr, Curc.sericeus, micans, Betul<e,SiC. 



Leptosomus, Sch., has the head very long behind, the rostrum very short, the thorax subcylindic, and the elytra 

 produced into two divergent spines. A single species, C. acuminatus, Fabr. New Holland. 



Leptocerus, (including many of Schonherr's genera), differs in having the fore-legs elongated, the tibiae curved, 

 the thighs thick and spined, and the tarsi often dilated and ciliated; the antennae are long and slender. (Chiefly 

 Brazilian species.) 



Phyllobius (including also many other genera of Schonherr), is winged, but the rostral fossula is straight and 

 short. 



The Brevirostres with the penultimate joint of the tarsi bilobed, the wings wanting, as well as the scutellum 

 form various other genera, such as Otiorhychus, Omias, Pachyrhynchus, Psalidium, Thylacites, Syzygops 

 Hyphantus, &C. 



