550 SUPPLEMENT. 
NAUTES (p. 277). 
As I have already stated, the genera Nautes and Tarpela are only provisionally 
adopted here. ‘The exotic Helopides require a thorough revision. | 
Nautes varians (p. 281). 
The antenne of this species are moderately long in the male, shorter in the female, 
with the apical three joints flattened and considerably dilated in both sexes—9 and 10 
longer than broad in the male, as broad as long in the female. The specimens treated 
as a variety should be separated. 
6 (a). Nautes stabilis. 
Nautes varians, var., huj. op. p. 281. 
To the Mexican localities given, add :-—Cuesta de Misantla (flohr). 
The chief differences between this insect, of which females only have been received 
as yet, and WV. varians have already been noted; it should also be added that the 
antenne (2) are much shorter, extending very little beyond the base of the thorax, 
and have their ninth and tenth joints transverse; the thorax is not only more coarsely, 
but more uniformly punctured (in WV. varians the punctures are more scattered and 
finer on the middle of the disc, and here show a tendency to become oblong in shape) . 
the elytral interstices are more distinctly punctured, as well as being more convex. 
6(s). Nautes alternans. 
Short ovate, rather broad, convex, the head and prothorax suffused with cupreous, metallic green, and golden, 
the elytra alternately and indeterminately striped with the same colours; the upper surface shining, 
glabrous. Head coarsely, densely punctate, the eyes prominent; antenne piceous, becoming testaceous 
towards the base, reaching to about the middle of the elytra, very slender at the base, and gradually 
thickening outwardly, the joints (1 and 2 excepted) elongate, 9 and 10 elongate-triangular ; prothorax 
more than twice as broad as long, strongly bisinuate at the base and rather feebly emarginate at the 
apex, the sides moderately rounded and converging from the base, the anterior angles rounded and not 
prominent, the hind angles rectangular, the surface closely, finely punctured—the punctures denser and 
longitudinally confluent towards the sides, and somewhat oblong in shape, the disc with a narrow space 
down the middle impunctate ; elytra a little wider than the prothorax at the base, slightly rounded at 
the sides, deeply striate throughout, the strie indistinctly punctured, the interstices strongly convex 
towards the sides and apex, feebly so towards the suture anteriorly, smooth ; beneath shining, pitchy- 
testaceous, with an sneous lustre, finely, sparsely punctate, the sides of the metasternum with coarser 
punctures, the flanks of the prothorax almost smooth; prosternum narrow, subhorizontal, strongly, 
acuminately produced, and received by the V-shaped mesosternum, the sides of latter moderately raised ; 
legs obscure testaceous, the femora darker. 
Length 5, breadth 2% millim. ( 9.) 
Hab. GuateMa.a, Zapote (Champion). 
One specimen. Allied to WV. varians and WN. incilis, but with the antenne much 
more slender; the elytra alternately striped with metallic colours, the interstices more 
