328 CALAXDRID^E. 



[LeConte. 



elongate -oval, a little wider than the prothorax, very convex, humeri very 

 oblique; surface feebly and sparsely punctulate. Under surface of trunk 

 and abdomen dusky. Length 5.8 mm.; 2.3 inch. 



tf. Last joint of antennae longer than the others united. 



9- Last joint of antennae shorter than the others united. 



The species of this genus are declared by Lacordaire to be apterous, and 

 so one would naturally suppose from the form of the body. On dissec ion, 

 however, the wings are found to be very well developed, and the elytra 

 not connate. 



Family VIII. CALANDKID^B. 



Mouth cavity variable according to subfamily, as follows: 



1. Gular peduncle very long, concealing the mentum and ligula, buccal 

 fissures narrow and long; mandibles compressed, with three apical teeth 

 in Calandridce (genuini). 



2. Floor of the mouth so prolonged that all of the organs are concealed, 

 except the mandibles, which are convex on the inner face, with three apical 

 teeth, and usually diverge externally in Rhinidce. 



3. Gular peduncle rather broad, maatum trapezoidal, transverse; maxil- 

 lary palpi rather large; mandibles flattened, curved, with the apex acute, 

 and one prominent tooth on the inner edge, in Cossonidce. 



Antennae geniculate, inserted near the base of the beak (Calandridce), 

 or about the middle (Rhinidce and Cossonidce) ; scape long, -funicle vary- 

 ing from four to seven joints; club variable, with the basal part, and some- 

 times nearly the whole surface shining, not sensitive: oval and annulated as 

 usual in Cossonidce. 



Head porrected, beak at most capable of being deflexed vertically, never 

 narrowed behind the eyes; beak sometimes long, sometimes short; eyes 

 sometimes small, sometimes very large and transverse, contiguous beneath 

 (Rhinidce}; antennal grooves very short, and not receiving the scape in 

 Calandridce, suddenly deflexed under the eyes, and receiving the scape in 

 Cossonidce. 



Prothorax truncate in front, not emarginate beneath, prosternum long in 

 front of the coxae, which are separated; prosternal sutures' effaced; the 

 transverse suture between the coxae is wanting in Calandridoe and Cosso- 

 nidce, but distinct in Rhinidce. 



Mesosternum triangular, truncate behind, side pieces varying according 

 to genus and tribe; middle coxae separated, cavities rounded. 



Metasternum usually long, episterna varying in breadth, broader in 

 front, epimera large in some Calandridce, small in other genera and sub- 

 families; hind coxse transverse, oval, not attaining the side of the abdo- 

 men. 



Elytra without epipleurae, exposing the pygidium in Calandridce, cover- 

 ing it more or less completely in the other subfamilies; on the inner surface 

 the elevated fold commences near the base, continues parallel and close to 

 the margin as far as the posterior curvature, where it diverges and becomes 



