HORN EXPEDITION—COLEOPTERA. 
269 
sexual characters, which in Chalcotania appear to me of the first importance. In 
the male specimen before me the metasternuni and hind coxaj are traversed by a 
deep and wide longitudinal concavity, which bears (besides fine sparse hairs similar 
to those of C. Beliance) a much denser pubescence in its middle part, and particularly 
on the sides of the coxae where they are divided by the projecting process of the 
basal ventral segment; this pubescence is continued on the front part of the 
ventral process (which is convex as in Beltatm) ; the middle part of the metaster¬ 
num and of the basal ventral segment is sparsely but very coarsely punctured, 
with some finer puncturation underlying the sexual pubescence ; the sides of the 
metasternum and hind coxte are coarsely and not closely vermiculate-rugulose, and 
the sides of the ventral segments are finely and closely punctulate; the apical 
ventral segment is incised with a deep triangular emargination. In the female 
the metasternum is scarcely concave and is devoid of close pubescence and fine 
puncturation, and the apical ventral segment is widely and feebly (but quite 
distinctly) triangularly emarginate. 
C. angulipennis, sp. nov. (4). Lata ; supra viridis (hie illic aurata), partibus 
elevatis apieeque plus minusve cterulescentibus, antennis (articulis basalibus 2 
exceptis) rufescentibus; subtus viridis •, capite longitudinaliter concavo, inter 
oculos grosse postice magis subtiliter punctulato ; prothorace quam longiori fere 
dimidio latiori, antice subito sat fortiter angustato, canaliculato, latera versus 
imequali et irregulariter oblique impresso, in partibus depressis crebre minus 
fortiter (in convexis grosse sparsim) punctulato, basi trisinuata ; elytris (superne 
visis) pone humeros angulariter dilatatis, postice extus denticulatis, supra inter- 
rupte ina^qualiter costatis, partibus depressis crebre minus fortiter (maculis binis 
quam partes depresspe ceteras magis crebre magis subtiliter) costis sparsim fortiter 
punctulatis ; metasterno et coxis posticis in parte mediana longitudinaliter planatis 
setis subtilibus erectis sparsissime vestitis, grosse sparsim punctulatis, latera 
versus imequaliter (hie grosse illic magis subtiliter) rugulosis ; abdomine in parte 
mediana grosse sparsim ad latera crebre subtilius punctulato, segmento basali in 
medio vix planato. 
Maris (1) segmento ventrali apicali anguste sat profunde triangulariter emar- 
ginato. Long. 14 1. Lat. 5;| 1. 
The species of Chalcotcenia belonging to the group of which this is a member 
(species of green colour, with elytral sculpture consisting of costaj and two feeble 
roundish impressions on the disc of each elytron) are very numerous and very 
closely allied inter se. The sculpture of their upper surface is too variable to be 
described in a manner that will enable the species to be confidently recognised. 
