GUIOPERUS. 457 
disc of each elytron, the inner one curved, of which there is no trace in G. circumdatus. 
There is a specimen of a Guioperus from Venezuela, in the British Museum, that 
doubtless belongs to the present species, but it wants the small anterior spot on each 
elytron. ‘The form of sculpture is intermediate between that of G. griseus and that 
of G. gerstacckeri. 
2. Guioperus trifasciatus, sp.n. (Tab. XXII. fig. 13.) 
Subovate, black, thickly clothed with narrow fulvous or brownish scales, the elytra with three dense pure 
white or yellowish fascize—the first basal, the second submedian, and the third placed at about one-third 
from the apex, the third curving round to the suture again before the tip,—the prothorax with a more 
or less distinct white or yellowish vitta on each side of the disc, the two vitte meeting in front, and 
the sides of the meso- and metasternum and the dorsal surface of the femora also densely clothed with 
white scales, the vestiture of the scutellum black or brownish-black. Head finely punctulate, feebly 
foveate between the eyes; rostrum rugosely punctate. Prothorax broader than long, narrowing from 
about the middle, the sides subparallel at the base; finely, somewhat thickly granulate. Elytra widest 
a little beyond the middle, gradually narrowing towards the base and there not very much wider than 
the prothorax, the humeri obtuse; seriate-punctate, the interstices uniseriato-granulate. Metasternal 
plice not very prominent. Tibiz with the submedian tooth sharp, the apical teeth only preceded by 
pencils of fulvous hairs. 
Length 93-13, breadth 6-8 millim. 
Hab. Mexico (Mus. Brit.), Puente de Ixtla in Morelos (H. H. Smith), Jalapa, 
Tapachula (Hoge); GuatemMaLa, Cerro Zunil (Champion), Escuintla (Conradt). 
Ten specimens. Near G. eques, but smaller, with the prothorax bivittate and the 
elytra trifasciate, the sternal side-pieces densely albo-squamose, the prothorax less 
dilated at the sides and more finely granulate, the elytra narrowed towards the base, 
the tibiz wanting the median pencils of fulvous hairs. T have not detected any sexual 
marks of distinction in this or any other species of the genus. The example figured 
is in very fresh condition. 
8. Guioperus eques. (Tab. XXII. fig. 14.) 
Guioperus eques, Pasc. Journ. Linn. Soc., Zool. xi. p. 4767. 
Hab. Nicaracua, Chontales (Belt, Janson '). 
We have received four specimens of this species. In one of them the two elytral 
fascie are pure white, and there is a narrow, additional, transverse, white median 
fascia on the prothorax, this latter becoming more distinct on the flanks. The 
dentiform fold or prominence on each side of the metasternum in front of the 
posterior coxe is very conspicuous. The tooth on the inner edge of each of the 
tibia near the middle is sharp and, like the two others at the apex, preceded by 
pencils of fulvous hairs. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 4, January 19085. 3 NN 
