218 
1. Tapeina dispar^ Serville. 
Tapeina dispar, Serv. Encycl. Method, x. p. 546. 
bicolor, id. ( $ ). 
dispar, Thomson, Archives Entomolog. i. p. 42, pi. 7- fig. 4 a, h. 
T. castaneo-mfa, capite thoraceqiie supra uigris nitidissimis, antermis 
nigris ; armatura frontaii maris elongata transversa, plana, apice 
utrinque obtuso truncate, margine superiore medio dentato. Long. 
Si-4 lin. c? $ . 
Generally distributed in tlie forests of the Amazons. 
2. Tapeina erectifroris, Thomson. 
Tapeina erectifrons, Thoms. Archives Entomol. i. p. 43, pi. 7- f- 2 a. 
T. nigra, nitida ; armatura frontaii maris elongata transversa, angus- 
tata, concava, apice utrinque rotundato, margine superiore sub- 
recto, margine inferiore utrinque angulato-dilatato. Long. 4-4 1 
lin. S $ . 
Generally distributed throughout the forests of the Amazons. 
Group Compsosominm. 
Genus Compsosoma, Serville. 
Serville, Ann. Soc. Ent. 1835, p. 55. 
This well-known and handsome genus of Lamiaires, by its 
compact, thick, oval forms, reminds one of the Anisocerina3 and 
Ilypsiomse. The group has been placed in the neighbourhood 
of the Hypselomiiise by Mr. Pascoe, and M. Thomson sees a re- 
semblance between the genus jErenea (belonging to the Comp- 
sosominse) and Gymnocerus. Compsosoma and its associated 
genera, however, differ from the Anisocerinse by the tarsal claws, 
which are scarcely divergent, and from the Hypselomin^ by the 
shortness of the claw-joint. The hairy clothing of body and an- 
tennae, and the form of the head, gradually rounded off or slo- 
ping from the occiput to the epistome, are also characters which 
distinguish the Compsosominse from the Anisocerinse and the 
Oncideritse, to Yf\\\CfiHypsioma 2 ii\dHypselomus belong. Although 
the lower part of the head, or muzzle, of some species resem- 
bles, in its square form, that of the Anisocerine group, yet this is 
evidently an inconstant character in the Compsosomiiise; for other 
species (e. g. Compsosoma Mniszechii) have almost precisely .the 
same form of muzzle as the Desmiphoritse, to which group I con- 
sider, notwithstanding the difference in the general form of the 
body, the Compsosorninse belong. This form of head is utterly 
foreign to the Anisocerinse and the Onciderit^e. 
