CISTELA.—ISOMITRA. 457 
2. Antenne (¢ ) very long and slender, subjiliform ; species large. 
11. Cistela fragilicornis. (Tab. XXI. fig. 2, 2.) 
Oblong ovate, rather broad, depressed, brownish-piceous with an seneous tint, scarcely shining, thickly clothed 
with short pubescence. Head very finely and closely punctured, with a deep frontal depression ; eyes (2 ) 
rather small; antenne ( @ ) long and very slender, reaching to about the middle of the elytra, the joints 
very long and subfiliform and but little widened towards their apex, the third joint shorter than the 
fourth, fusco-testaceous ; prothorax transverse, the sides converging from the base, the hind angles sub- 
rectangular, the disc very distinctly canaliculate (more deeply so behind) and with an oblique foveate 
impression on each side (sometimes connected by a shallow transverse groove) a little behind the middle, 
the basal foveze deep and usually connected by a very narrow deep groove running along the basal 
margin, the space in front of the basal groove transversely raised, the surface minutely and densely punc- 
tured ; scutellum finely and closely punctured ; elytra long, a little rounded and acutely margined at the 
sides, very shallowly and minutely punctate-striate from the base to the apex, the interstices almost flat 
and densely and minutely punctured, the surface less dull and of a more sneous tint than that of the 
prothorax ; beneath finely and densely punctured, the metasternum more sparsely and more coarsely so at 
the sides ; anterior and intermediate coxe narrowly separated ; legs long and slender, the tarsi compara- 
tively very long, brownish-piceous, the tarsi more or less ferruginous. 
Length 113-123 millim.; breadth 44-5 millim. (9.) 
Hab. Guatemata, Calderas 6000 to 7000 feet (Champion). 
Six examples, all females. This is the largest species of this group inhabiting the 
Central-American region. As will be seen from the above description, C. fragilicornis 
is very distinct from any other species here enumerated. The antenne are long, 
slender, and subfiliform ; they are possibly still longer in the male. 
I met with this species only on the slopes of the Volcan de Fuego. 
ISOMIRA. 
Isomira, Mulsant, Hist. Nat. Col. de France, Pectinipédes, p. 52 (1856) ; Lacordaire, Gen. Col. v. 
p- 506 (1859). 
The Central-American species referred to this genus agree in having the antenne 
slender, moderately long, and the third joint fully as long as the fourth in both sexes, 
and the penultimate joint of the tarsi not lobed beneath ; the males have a simple (but 
hidden) sixth ventral segment, the sides of which are not lobed. The few species 
described are from Europe, Morocco, and North America. In Central America the 
genus is not known to me from south of Guatemala. 
1. Isomira obsoleta. (Tab. XXI. fig. 3, ¢ .) 
Oblong ovate, rather broad and convex, obscure reddish- or piceous-brown with a slight zneous tinge, densely 
clothed with short fulvous pubescence, scarcely shining. Head closely and finely punctured; eyes mode- 
rately large; antenne slender and subfiliform in both sexes, in the male reaching to about the first third 
of the elytra, the third and fourth joints long and about equal in length, ferruginous; prothorax twice as 
broad as long at the base, the sides rounded and rapidly converging from the rather obtuse hind angles, 
the basal fovez scarcely indicated, the disc feebly impressed in the middle behind, the surface finely, 
densely, and equally punctured; scutellum closely and finely punctured; elytra rather long, the sides 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, November 1888. 3NN 
