PYANISIA. 331 
based upon a variety of the same species *. The large number of specimens collected 
by Herr Hoge at Las Vigas connect the various forms. Examples from Chihuahua 
and Durango are rather more elongate and depressed, and with still more prominent 
humeri: these agree with the description of Cymatothes opacus. 
4. Pyanisia longicollis. (Tab. XIV. fig. 5.) 
Oblong ovate, depressed, dull black. Head very closely, shallowly, and somewhat finely punctured ; antennee 
with joints 8-10 rather longer than broad, piceous or ferruginous ; prothorax about as long as broad, as 
wide as or rather wider in front than at the base, the sides a little rounded about the middle, narrowing 
thence to the base, very slightly narrowed in front, and sometimes a little sinuate immediately before the 
obtuse hind angles, the anterior angles rounded, the base broadly and feebly arcuate, straight in the 
middle, the surface finely and rather sparingly, but very distinctly, punctured ; scutellum strongly trans- 
verse ; elytra moderately long, depressed on the disc, ovate in form and rather abruptly narrowed towards 
the base, the humeri a little swollen and strongly and subacutely produced in front, with rows of compa- 
ratively coarse rather shallow impressions, the impressions placed upon shallow almost obsolete striz, the 
interstices flat on the disc, feebly convex towards the sides and apex, and sparingly and very evidently 
punctured ; beneath more shining, rather coarsely and somewhat closely, the flanks of the prothorax very 
sparingly, punctured ; prosternum declivous, grooved in the middle between the cox, the apex broadly 
produced and armed in the middle with a stout conical prominence. | 
Length 11-13 millim.; breadth 43-53 millim. (¢ @.) 
Hab. Guatemata, Totonicapam 8500 to 10,500 feet, slopes of the Volcan de Fuego 
above Duefias 6500 feet (Champion). 
Numerous examples. P. longicollis is separated from P. opaca by the thorax being 
longer and narrower, and rather less rounded at the sides ; the elytra more abruptly 
‘narrowed at the base and with the humeri still more acutely produced and projecting a 
little outwardly, and substriate, the punctures of the striz coarser. The single 
specimen from Duefas is rather shorter in form, and has the humeri not quite so 
prominent; it, no doubt, represents a local variety of the same species. 
é 
5. Pyanisia fumosa. 
Pyanisia fumosa, F. Bates in litt. 
Oblong ovate, comparatively short, strongly convex, dull black. Head very shallowly and closely punctured ; 
antenne with joints 8-10 rather longer than broad, piceous, the five outer joints often ferruginous ; 
prothorax rather broader than long, strongly transversely convex, the sides rounded and about equally 
narrowed before and behind the middle, the angles but little prominent, the base broadly and feebly 
arcuate, straight in the middle, the surface smooth; scutellum triangular; elytra comparatively short, 
ovate, convex, slightly depressed on the basal half of the disc, the humeri moderately produced in front, 
very finely and lightly striate, the strie with fine elongate rather closely placed impressions (the impres- 
sions still finer on the disc and becoming a little coarser towards the sides), the interstices flat on the 
disc, slightly convex towards the sides and apex, and almost smooth ; beneath more shining, closely and 
somewhat coarsely punctured, the flanks of the prothorax almost smooth ; prosternum declivous, grooved 
in the middle between the cox, the apex scarcely raised. 
Length 8-10 millim.; breadth 4-5 millim. (3 &.) 
* Cymatothes coarctatus, Sol., is treated by Lacordaire and Gemminger and Harold as synonymous with 
P. tristis, Casteln. From Solier’s description it appears to me to be a variety of P. opaca. 
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