107 
portion of the elytron, where the innermost of the two striz is well 
marked, and the suture of the elytra is at this part somewhat ele- 
vated. Numerous oblique furrows are observable on the produced 
apical portion of the elytra. The portion of the elytra which lies 
below the keel presents no distinct sculpturing. ‘The abdominal 
segment presents scarcely any trace of longitudinal ruge. The legs 
are black, but have a slightly pitchy hue. 
Species of Nyctelia from the collection formed by C. Darwin, Esq., 
during the voyage of H.M.S. Beagle. 
Nycrezia pricata. Nyct. ovata, nigra, nitida; capite anteriore 
crebre punctato, posteriore fere levi; thorace transverso, elytris 
angustiore ; angulis posticis productis, obtusis, supra ad medium 
pauld convexo, et crebré punctato ; elytris latis, subovatis, convezis, 
sulcis profundis transversalibus, a margine externo feré ad sutu- 
ram ductis, plagd suturali profunde indentatd. 
Long. corp. (¢) 138 lin.; lat. 74; vel, long. 114 lin., lat. 64 lin. 
Long. corp. (2) 122 lin., lat. 73 lin. 
Hab. Port Desire. 
This species is considerably larger than N. /evis; the thorax is 
proportionately broader and shorter, and the produced apical portion 
of the elytra is dilated and depressed. The head is thickly punc- 
tured in front, and there are numerous punctures at the sides above 
and behind the eyes. The thorax is about twice as broad as long; 
the broadest part is behind, but till anterior to the middle it scarcely 
decreases in width ; from the middle to the fore-part the transverse 
diameter is gradually lessened, so that the lateral margins form a 
gentle curve ; the anterior portion is emarginated, and the posterior 
margin is rather strongly sinuated; the anterior angles are acute, 
and the posterior angles are rounded. The upper surface of the 
thorax is convex in the middle, but towards the sides it is slightly 
concave; it is thickly punctured, and the punctures are many of 
them confluent; on the disc the punctures are much less numerous. 
The elytra are about one-fourth broader than the thorax (rather less 
in the male sex), and about one-fourth longer than broad; they are 
very convex, indented at the suture, and furnished with a series of 
nearly transverse indentations, about eighteen or twenty in number, 
which commence at the lateral keel and terminate about one-eighth 
of an inch short of the suture; the space between these transverse 
folds and the suture is apparently smooth; but with a moderately 
strong lens some very minute tubercles may be observed scattered 
on this part, as well as on the interspaces of the transverse indenta- 
tions, which are about equal in width to the grooves: the apical 
portion of the elytra is considerably produced, and the produced part 
is broad and somewhat depressed, and has the upper surface rugose. 
The mentum is coarsely punctured, and the under side of the head is 
thickly punctured : the prosternum is coarsely punctured in the mid- 
dle, and has some irregular ruge at the sides; at the lateral margin 
is a series of small transverse ruge : the mesosternum and metaster- 
num have irregular rugz in the middle, and the two first and half of 
