116 
On the first and basal half of the second abdominal segments are 
distinct longitudinal rugz, and a slight trace of similar rugz is ob- 
served at the base of the third segment ; on other parts of these seg- 
ments are some minute scattered punctures. The terminal segment 
is rather thickly though finely punctured. The legs are clothed with 
longish ash-coloured hairs. 
Nyctelia nodosa, Latr. Zophosis nodosa, Germar ? 
Five specimens of this species are contained in the collection of 
Mr. Darwin, and these are from three different localities, viz. Mal- 
donado (La Plata), Bahia Blanca, and Mendoza. 
Nycrezia aneustata. Nyct. atra, elongata, nitida; capite distincté 
punctato et tranversim impresso ; antennis piceis ; thorace subqua- 
drato, lateribus feré rectis, antice emarginato, supra punctis mi- 
nutissimis ; elytris subelongatis, et cum thorace quoad latitudinem 
fere coequalibus, costis aliquantd irregularibus subelevatis inter- 
stitits rugulosis, ad latera plicis transversalibus. 
Long. corp. 74 lin.; lat. 32 lin. 
Hab. Patagonia? 
The specimen from which the above characters are taken is a 
male, and by accident its label, containing the habitat, is lost; it is 
most probably from Patagonia. In general appearance the N. an- 
gustata greatly resembles the N. nodosa, but it differs in being of a 
narrower form, and in having the terminal joints (the fifth to the 
tenth inclusive) broader; the anterior tibie are also broader and 
rather shorter, and the thorax is longer in proportion to the width. 
The head is distinctly and very thickly punctured in front. The 
thorax approaches to a quadrate form, but is slightly narrower in 
front than behind ; the lateral margins form a very slight curve, and 
in fact are nearly straight ; in front it is emarginated, and the emar- 
ginated portion is in the form of a segment of a circle; the hinder 
margin is but little waved; the anterior angles are acute, and the 
posterior angles are slightly produced and rounded at the point; a 
faint impressed line borders the anterior and lateral margins: the 
upper surface is but little convex and finely punctured, but on the 
disc the punctures are scarcely traceable: the length of the thorax 
is about equal to three-fifths of the width, whereas in N. nodosa the 
length is about equal to half the width. ‘The elytra are very little 
broader than the thorax, being scarcely dilated in the middle, and 
are about one-third longer than broad; they have interrupted and 
somewhat irregular longitudinal grooves or striz, and the jnter- 
spaces are convex; the third and fifth most distinctly so: the strie 
and interspaces on the lateral half of each elytron have distinct irre- 
gular ruge, the largest of which are for the most part transverse 
in direction: the legs are long; the claws are of a pitchy colour. 
The fifth, sixth, seventh and eighth joints of the antenne are some- 
what compressed, broader than long, and produced in front so as to 
present nearly a triangular form; the ninth and tenth are still broad, 
but of a somewhat rounded form. 
