344 MANDIBULATA. — COLEOPTERA. 



Black, slightly pubescent ; punctured : elytra punctate-striate : the antennae and 

 legs pitchy-brown. 



Also found in Suffolk : it may be only a more mature state of the 

 foregoing insect. 



Genus CCLIX. — Cis, Latreille. 



Antennae inserted at the base of the mandibles, the basal joint large, robust, 

 ovate ; the second smaller, ovate ; third slender, obconic ; the four following 

 very short, coarctate, truncate ; the remaining three large, forming a sub- 

 perfoliate elongate club, of which the two basal joints are truncate, and the 

 terminal one ovate. Palpi unequal, maxillary thickened externally, with the 

 terminal joint subovate; labial small, subulated, with the apical joint slender, 

 conic: mandibles exserted, apex bidentate : head transverse ; sometimes tuber- 

 culated in front in the males ; eyes prominent : thorax transverse, margined; 

 the anterior edge generally produced over the head : body ovate, convex above : 

 tarsi tetramerous. 



Cis, which from its tetramerous tarsi is placed by Latreille at a 

 remote distance from Ptinus, appears both in habit and structure to 

 approximate closely to the genus last mentioned, or rather to the 

 family of which it forms the type : like Anobium and Choragus 

 the three terminal joints of the antennae are suddenly elongate and 

 incrassated, but from the former genus it may be known by its 

 tetramerous tarsi, and from the latter by its more cylindric form, 

 the different structure of the antennae, &c. : — the species feed upon 

 Boleti. 



Sp. 1. Boleti. Brunneo-nigricans aut castaneus, nitidiusculus, temere punc- 

 tulatus, elytris subrugulosis, antennis pedihusque dilutioribus, rufescentibus. 

 (Long. corp. if— 2 lin.) 



An. Boleti. Fabricius.— Cis Boleti. Steph. Catal. 142. No. 1439. 



Dusky-brown or castaneous, somewhat pubescent, and a little glossy, thickly 

 punctured : the thorax unequal, reflexed anteriorly, with the sides broadly 

 margined, and obtusely angulated posteriorly; elytra somewhat irregularly 

 rugulose-punctate : antennae and legs rufescent, or testaceous. 



Variable in colour, arising from its state of maturity, being more or less pale 

 brown or testaceous, sometimes nearly ochreous. 



Found in Boleti during the summer very abundantly. " Dalston- 

 wood." — T. C. Hey sham, Esq. " Swansea." — L. W. Dillwyn, 

 Esq. 



