DELTASPIS.—TRAGIDION. 17 
from Chevrolat’s remarks on the type species and Serville’s own description, whether 
Lacordaire’s definition in the ‘Genera’ (ix. p. 172) applies strictly to the genus. 
D. thoracica, White, and the two new species described below agree, however, very 
well with the generic characters given by Serville. 
1. Deltaspis auromarginata. 
Deltaspis auromarginata, Serville, Ann. Soc. Ent. Fr. 1834, p. 8. 
Hab. Mexico. 
2. Deltaspis thoracica. 
Deltaspis thoracica, White, Cat. Col. Long. B. M. i. p. 148. 
Hab. Mexico. 
3. Deltaspis rubriventris. 
Elongata, cylindrica, breviter pilosa, nigra, elytris lete viridibus, femoribus, metasterno’ abdomineque rufis, 
thorace subeneo tincto ; capite thoraceque grosse sparsim punctatis, hoc subquadrato, medio paullo latiore 
ibique utrinque tuberculo conico armato, disco quinquetuberoso; scutello triangulari haud elongato, 
grosse punctato, nigro; elytris confertissime subconfluenter punctatis; pedibus pilosis, tibiis posticis 
leviter dilatato-compressis ; antennis $ dupla longitudine corporis, articulis 3°-10™ subsequalibus haud 
sulcatis, 11™° multo longiore appendiculato, prosterno apice paullo producto, verticali. 
Long. 10-11 lin. ¢ 9. 
Hab. Mexico (Boucard). 
4. Deltaspis nigripennis. 
Subcylindrica, nigra, breviter pilosa, pronoto abdomineque coccineis; capite confluenter punctato; thorace 
convexo dorso obtuse tuberculato, disperse punctato, lateribus utrinque tuberculo conico, basi reflexo- 
marginato; elytris apice obtuse rotundatis, subcrebre subtiliter punctatis; prosterno apice verticali 
antennis 9 corpore paullo longioribus, filiformibus, crebre punctatis, articulis 3°-11" subqualibus; 
scutello breviter triangulari. 
Long. 8 lin. @. 
Hab.. Mexico (Boucard). 
The bright red colour of the pronotum extends on each flank nearly to the anterior 
acetabula. The insect is shorter than D. rubriventris, and the punctuation of the 
elytra much finer ; they are of a deep violet-black and slightly shining. 
TRAGIDION. 
Tragidion, Serville, Ann. Soc. Ent. Fr, 1834, p. 89. 
Five species have been described, chiefly from the United States, one of them ranging 
as far north as Canada. One species only is exclusively Mexican. 
1. Tragidion annulatum. 
Tragidion.annulatum, Leconte, Proc. Ac. Phil. 1858, p. 83°. 
Hab. Mezxico, Sonora !.—Norta America, Lower California. 
