OCTOTOMA. 87 
Body above yellowish fulvous; head impunctate; antenne black; thorax with rather 
large punctures, a black dorsal line; scutellum black; elytra serrate, with double 
series of punctures, and interstitial, slender, elevated lines ; tip black-brown, not more 
than one fifth of the whole surface of the elytra; pectus and postpectus with a lateral 
black vitta, dilating behind ; feet black, thighs fulvous at bases; venter black, yellowish 
each side. Length more than one fifth of an inch.” 
- Hab. Mexico}, 
Dr. Chapuis has included this species in the present genus, placing it not far from 
C. bellulus. Say’s description does not well agree with the subsection to which Chapuis 
has assigned it. 
Section 2. Four to nine upper joints of the antenne united into a single piece. 
+ Interocular space not distinctly produced ; four to five upper joints of the antenne 
closely united. 
* Elytra sinuate-punctate, irregularly elevate-reticulate. 
CTOTOMA. 
Octotoma, Suffrian, Wiegm. Archiv, 1866, i. p. 234; Horn, Trans. Am. Ent. Soc. x. p. 299. 
The species of this peculiar genus may be at once known from any other American 
form by the strongly raised anastomosing ridges which extend irregularly over the whole 
disc of the elytra. The different species are very closely allied, and it will require long 
careful study, and the examination of a long series of each specific form, to define 
accurately their proper limits. The genus ranges from the United States of North 
America to Brazil. 
1. Octotoma scabripennis. (Tab. IV. fig. 2.) 
Octoma scabripennis, Guér. Icon. de Régne Anim. iii. Texte, p. 279". 
- Sat elongata, dorso deplanata; subtus nitida, nigra, thoracis inferioris lateribus pedibusque piceis, his nigro 
maculatis; supra subnitida, piceo-fulva aut picea, vertice thoracisque plagis nigris; thorace fortiter punc- 
_ tato, disco excavato; elytris anguste oblongis, apicem versus paullo ampliatis, serrulatis, apice obtuse 
rotundatis, magis fortiter serratis, nigro-cupreis, seriato-punctatis, rete elevato irregulari, hic illic valde 
cristatis. . 
Mas. Elytrorum iateribus ante apicem sinuatis, angulo postico extrorsum producto. 
Fem. Elytrorum lateribus ante apicem non sinuatis, angulo postico extrorsum non producto, — 
Long. 24-3 lin. . 
Hab. Mexico}, Juquila, Guanajuato, Oaxaca (Sallé, Hoge); Guatemaua, San Geré- 
nimo (Champion) ; Nicaracua, Chontales (Belt). 
Vertex subrugose-punctate. Antenne rather longer than the head and thorax, 
piceo-fulvous, the upper joints sometimes black or nigro-piceous. Thorax transverse ; 
