GONIADERA.—XANTHICLES, 231 
Hab. Nicaracva, Chontales (Belt, Janson, coll. F. Bates); Panama, Volcan de 
Chiriqui (Champion). 
Six examples. The two individuals from the State of Panama have the upper surface 
more sparingly and more coarsely punctured, the shallow elytral grooves more distinctly 
impressed, and the thorax less angularly extended at the sides; they cannot, however, 
be regarded as representing more than a variety of the Nicaraguan insect. G pilosa 
will be known from its allies by its very hairy upper surface. 
6. Goniadera alternata. (Tab. X. fig. 15, 3.) 
Goniadera alternata, F. Bates in litt. 
Black, shining, clothed with short scattered hairs, the inequalities of the rough upper surface (of the head and 
thorax especially) often more or less filled with earthy-looking scales. Head short, coarsely and rugu- 
losely punctate (the punctures more or less confluent), shallowly impressed transversely in front ; antenns 
short, slightly passing the base of the prothorax, the second joint strongly transverse; prothorax trans- 
verse, the sides broadly extended just before the middle, thence narrowing and sinuous to the base, the 
anterior angles broad and produced in front, the hind angles rather sharp and prominent and directed out- 
wards, the lateral margins slightly expanded and crenulate, the base broadly truncate in the middle and 
emarginate on each side just within the angles, the surface rough and covered with irregular, more or less 
granular tubercles ; elytra comparatively short, broad, depressed on the disc, with narrow, more or less 
interrupted, longitudinal ridges alternating with rows of short longitudinal elevations, the interstices 
coarsely, irregularly, and rather closely punctured; beneath shining, sparingly and finely punctured ; 
legs short, the anterior tibiw in the male with a broad tooth on the inner side before the apex. 
Length 11-13 millim. (¢ 2.) 
Hab. Mexico (Sallé); British Honpuras, Belize, R. Sarstoon (Llancaneaux) ; GuatE- 
maza (coll. F. Bates), Senahu, San Juan in Vera Paz, Las Mercedes (Champion); Panama, 
Volcan de Chiriqui (Champion). 
A widely distributed though apparently rare species. (G. alternata agrees perfectly 
in general structure with G. interrupta, from Pebas, Peru, described at great length by 
Mr. F. Bates (cf. Trans. Ent. Soc. Lond. 1868, pp. 312 & 313, t. 10. f. 3), and some 
undescribed South-American species; it will be known at once from G. interrupta 
by the different sculpture of the elytra, ¢. 9. longitudinal slightly interrupted ridges 
alternating with rows of short longitudinal elevations, the interspaces much more evi- 
dently punctured. An example from Senahu is figured. 
XANTHICLES. 
Mentum much as in Goniadera, longer than broad, widening from the base, but little rounded at the sides, the 
anterior angles prominent, longitudinally carinate in the middle ; last joint of the maxillary palpi broadly 
securiform (as in Goniadera), that of the labial palpi short and broad ovate ; mandibles cleft at the apex; 
antennee very stout, joint 2 very short and strongly transverse, 3 short, about as broad as long, and twice 
as long as 2, joints 4-6 distinctly wider, subequal, and each nearly twice as long as 3, 7-10 widening a 
little outwardly, 11 longer than 10, abruptly and obliquely truncate at the apex, the outer apical angle 
slightly produced ; head much as in Goniadera, but not swollen on each side behind the eyes, and longer ; 
eyes completely divided at the side, the upper portion much smaller than the lower and oblique ; prothorax, 
scutellum, elytra, and legs as in Goniadera, the elytra punctate-striate ; epipleuree broad to the third 
