MONOCESTA. 



479 



elytra closely granulate-punctate, uniformly covered with short greyish pubescence; underside more 

 shining, the tibiae and tarsi black. 

 Eab. Nicakagua, Chontales (Janson) ; Panama, Volcan de Chiriqui, Bugaba, David, 

 Caldera (Champion). 



Closely allied to M. atricornis, Clark, but smaller, paler in colour ; the antennae 

 much longer and their joints proportionately more slender, the tibiae and tarsi black. In 

 some examples the antennae are entirely black, and the elytra have a shade of fuscous 

 towards their posterior portion ; in others the thorax is spotted with piceous, owing 

 probably to discoloration. 



Only a single specimen was obtained in Nicaragua ; many examples in the State of 



Panama. 



6. Monocesta cyaneo-maculata. (Tab. XXVII. fig. 7.) 



Testaceous; the apices of the tibiae and the tarsi black ; thorax sparingly and finely punctured; elytra closely 

 pubescent, a narrow transverse band at the base and a spot below the middle, as well as the suture 

 narrowly, blue, opaque. 



Length 3 lines. 



Head obsoletely and finely punctured ; antennas slender, two thirds the length of the body, the fourth joint 

 slightly longer than the preceding or the following joints ; thorax three times as broad as long, short, the 

 sides produced into an angle at the middle, the surface obsoletely depressed at each side, finely and irre- 

 gularly punctured, glabrous ; scutellum broad, testaceous ; elytra extremely minutely punctured and 

 covered, with short and fine pubescence rendering the surface entirely opaque, testaceous, a deeply dentate 

 transverse band at the base (not quite extending to the lateral margin), an elongate spot at the sides below 

 the middle, and the sutural margin, light blue. 



Eab. Mexico, Vera Cruz (SalU). 



This small species somewhat resembles M. jansoni in the pattern of its elytra ; the 

 small size, blue sutural margin, the short and transverse thorax, and the black apices 

 of the tibia? and tarsi will help to distinguish M. cyaneo-maculata. 



7. Monocesta hopfneri. 



Monocesta hopfneri, Clark, Ann. & Mag. Nat. Hist. 3rd ser. xvi. p. 267 \ 

 Cozlomera hopfneri, Dej. Cat. 3rd ed. p. 400 2 . 



Eab. Mexico 12 . 



Of this and the following species a single specimen is contained in the British 

 Museum. M. hopfneri greatly resembles Trirrhabda (Bircema) modesta, Baly, from 

 Colombia, in coloration and sculpture, but the thorax is unspotted, and the general 

 size larger, the elytra are also more finely punctured. 



8. Monocesta frontalis. 



Monocesta frontalis, Clark, Ann. & Mag. Nat. Hist. 3rd ser. xvi. p. 317 \ 



Eab. Mexico, Campeche in Yucatan K 



Distinguished by the black vertex of the head, the uniform flavo-testaceous colour, 

 and the similarly coloured first six joints of the antennae. 



