STENAGRIA. 239 
2. Stenagria opacula. 
Elongata, parum convexa, fusco-rufa, opaca, obsolete punctata; thorace elongato, canaliculato; abdomine 
latiuseulo, parce obsoleteque punctato, subnitido. 
Long. 42 millim. 
Hab. Mexico, Cordova (Hoge). 
Antenne elongate; third joint rather longer than second ; penultimate joint scarcely 
longer than broad. Head, thorax, and elytra not visibly punctate, but quite dull 
owing to the surface being very densely and finely alutaceous; the head quite rounded 
behind. Thorax with a very definite channel, which does not extend to the front, the 
front much rounded, the sides gradually narrowed to the base. Elytra broad, with 
prominent free shoulders, about as long as the thorax. Legs very elongate. Basal 
abdominal segment with a curved impression. 
This species is peculiar by the excessively fine sculpture of the anterior parts, by 
which they are made quite dull. The three individuals found by Hége are extremely 
similar to one another. 
8. Stenagria constricta. 
Elongata, nitidula, fere impunctata, nigra, pedibus basi apiceque testaceis, antennarum basi fusco-rufa; 
abdominis subtus convexi basi constricta, segmento basali testaceo, magno, in medio arcuatim impresso. 
Long. cire. 33 millim. 
Hab. GuaTEMALA, Chacoj in Vera Paz (Champion). 
Of this remarkable species I have before me only an example in fragments found 
among Mr. Champion’s duplicates. The basal joints of the antenne are elongate and 
slender; the others are lost. The head is elongate and much narrowed behind the 
eyes, its surface polished and impunctate. Thorax elongate and narrow, the front 
slightly emarginate, the front portion twice as broad as the elongate and narrow basal 
portion; along the middle runs a very deep and broad depression; the surface is 
shining and impunctate. LElytra broad and short, scarcely so long as the thorax, 
shining and impunctate. Hind body very convex beneath, and narrow at the base, so 
that it is there very constricted and mobile; the basal segment is yellow, and appears 
to be a good deal longer than the others, and has at the base in the middle a large, 
deep, curved impression. Legs elongate and very slender, nearly black, trochanters 
pale, and the tibize towards the extremity and the tarsi pale. 
Although this insect is very remarkable by the shape of the head, prothorax, and 
abdomen, yet the peculiarities it exhibits are evidently only an exaggeration of what we 
find in &. gracilipes; the exaggeration, however, is great; and should intermediates not 
be found, the insect will prove to be the representative of a very distinct genus, 
