CALANDRIDAE. 5U3 



Sul)-Family II.— CYLADIX.E. 



Tliis sub-feinily rcj>rosetits the tribe Cylades, of Lacordairc, 

 ))laced by liiiii between Eurhyiicluis and Apion, and consists of 

 but two genera, one oi' wliicii, C'ylas, occurs in Asia and Africa, 

 wliile the other, Myrniacicelus, is found in Australia. The char- 

 acters of this sub-family are sufficiently exposed in the description 

 of tiie family, and the singular form of the antennae, as well as 

 the very peculiar appearance of the insect, will enable it to be 

 easily recognized. 



The relations of these insects with Brenthidoe were well recog- 

 nized by Fabricius, Latreille, and Olivier, and we know not for 

 what reason tiiey have been lost sight of by more recent observers. 



Cylas formicariua is injurious to the tuber of the sweet potato 

 in Louisiana and Florida. It also occurs in the Antilles, Cochin 

 China, India, and Madagascar. It has probably been introduced 

 from Asia. 



Fam. LXXXI.— CALANDRIDAE. 



Mouth cavity variable according to sub-faniily, as fol- 

 lows: — 



1. Gular peduncle very long, concealing the raentum and 

 ligula, buccal tissures narrow and long; mandibles com- 

 pressed, witli three apical teeth in Calandrinaj (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 a})ical teeth, and usually diverge 

 externally in Rhininie. 



3. Gular peduncle rather broad, mentum trapezoidal, 

 transverse; maxillary palpi rather large; mandibles flat- 

 tened, curved, with the apex acute, and one prominent tooth 

 on the inner edge in Cossonintie. 



Anteinme geniculate, inserted near the base of the beak 

 (Calandrinae) or about the middle (Rhinina? and Cossonina^) ; 

 scape long, fnnicle varying from four to seven joints; club 

 variable, \\\\\\ the basal part, and sometimes nearly the 

 whole surface shining, not sensitive; oval and annulated as 

 usual in most Cossonina?. 



Head porrected, beak at most capable of being deflexed 

 vertically, never narrowed behind the eyes; beak sometimes 

 long, sometimes short; eyes sometimes small, sometimes 



