103 
in both sexes as in P. Chryseis; but the ventral plate in the $ is 
briefly notched at the apex. 
This species has a wide range. I have specimens before me 
from Rio Janeiro, the Upper Amazons, and Cayenne. It is also 
found in Mexico, but exists there under the form of a well- 
marked local variety or race, the P.mexicanus of Thomson (Classif. 
des Ceramb. p. 17). This difiPers from the South-American form 
by the orange-coloured marginal streak extending to the tip of 
the elytra, instead of halting halfway, and by the thoracic vitta 
extending over the crown of the head. 
3. Probatius partitus, White. 
P. ellipticus : capite, thorace (brunneo indistincte bivittato) articulo- 
que basali antennarum testaceo-ochraceis : elytris postice valde 
attenuatis, nigris, nitidis, basi obscure testaceis, maculis minutis 
griseis in fasciis undulatis tribus dispositis, nigro setosis, striato- 
punctatis, postice unicarinatis. Long. 4-4f lin. 
The apical abdominal segment is of a similar form in both 
sexes to that of P. Chryseis. The antennae, excepting the pale 
oasal joint, are black, with the bases of the joints whitish. The 
thoracic spines are thick, conical, and obtuse. The apical spines 
of the elytra are very long and acute, the smooth posterior carinae 
of the wing-cases continuing to their tips. 
Found at Para, on dead boughs in the forest. It has also 
been found by M. Bar in the interior of French Guiana, speci- 
mens collected by that gentleman having been sent to me from 
Paris under the MS. name of P. ruficollis. 
4. Probatius apicalis^ n. sp. 
P. oblongo-ovatus, fusco-niger, sordide ochraceo canoque variegatus; 
thorace ochraceo nebuloso, medio fusco bivittato : elytris postice 
modice attenuatis, apice transverse sinuato-truncatis, angulis ex- 
ternis longe spinosis, dorso punctis setiferis in striis dispositis, 
dimidio basali maculaque apicali ochraceis nigro conspersis, fascia 
lata pone medium fusco-nigra lineolis canis variegata : antennis 
fusco-nigris, infra dense setosis, articulo quarto annulo lato pallido. 
Long. 4| lin. c? $ . 
Head dingy ochraceous ; vertex with two divergent blackish 
vittse. Antennae black ; basal joint dingy rufous, second and 
base of third joints hoary, basal half of fourth whitish ; they are 
furnished with long setae, the first joint being fringed beneath 
with them. Thorax dingy ochraceous, partly lighter and partly 
darker in hue, the centre having two nearly parallel, distinct, 
dark-brown vittae ; the lateral spines are large, conical, simply 
acute, and not prolonged at their points. Elytra gradually and 
moderately narrowed to their tips, which latter are transversely 
