LONGICORNIA. BIT 
Varies in length from 3-54 lines, and in general colour from blackish brown to tawny 
rufous brown. The only constant character which distinguishes it from 4. antennator 
(Fabr., Bates) of Guiano-Amazonia and other species from South Brazil is the large 
size of the sharp tubercles which stud the elevated lines of the elytra. 
STEIRASTOMA (p. 138). 
Steirastoma histrionica (p. 138). 
The localities given for this species are inexact and must be replaced by the following 
list, in which also subsequent additions are included :—MeExico, Orizaba, Tuxtla, Playa 
Vicente, Cordova (Sallé), Misantla, Almolonga (Hoge); Britisa Honpuras, Belize 
(Blancaneaux) ; Guatemata, Torola (Champion) ; Nicaraaua, Chontales (Belt, Janson) ; 
Costa Rica, Cache (Rogers); Panama (Boucard), Volcan de Chiriqui, Bugaba, Tolé 
(Champion). 
Var. S. larva (p. 188). Differt thoracis lateribus utrinque, elytrisque sub humeros et apud discum, macula 
cinereo-alba. 
Hab. Panama (Champion, Macleannan, Boucard)—SovutnH America, Colombia- 
Venezuela. 
The Venezuelan 8. larva proves to be only a geographical variety of the Mexican 
S. histrionica, when a long series of specimens from intermediate localities is examined. 
The structural peculiarities mentioned by Chevrolat are of no value, as they vary according 
to the degree of development of the insect; the colour of the pubescent stripes on the 
elytra is very similar in the specimens from all the localities, and the only differential 
characters which seem to be really distinctive are the greyish-white spots on the sides 
of the thorax, under the shoulders of the elytra, and on the disc of the latter. I have 
seen specimens with these spots, in Central-American collections, only from the Isthmus. 
of Panama, where they appear to be mixed with normal examples of S. histrionica. 
2 (a). Steirastoma coenosa. (Tab. XXIII. fig. 6.) 
Steirastoma cenosum, Bates, Ann. & Mag. N. H. ser. 3, ix. p. 898°. 
Hab. Panama, Bugaba (Champion).—Soutn AMeERicA, Amazons !. 
Similar to S. melanogenys, though broader and with larger and more compact velvety- 
black elytral spots, and the sides of the thorax also velvety-black. In structure it 
differs in the truncature of the elytra being oblique, and the apical spines consequently 
nearer together, and the third antennal joint underneath having a few short bristles. 
instead of a cluster of spines. 
Steirastoma senex (p. 138). 
To the localities given, add:—GuatemaLa, Cerro Zunil, San Isidro, El Reposo, Las 
Mercedes, Torola (Champion) ; Panama, Bugaba (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. V., Judy 1885. 3¢ 
