TRACHELIUM.—CYDAMUS. 159 
with the second joint of the rostrum usually distinctly longer than the two apical joints 
taken together, is at present represented by four genera in Central America. The 
Neotropical and Nearctic regions possess five genera of Micrelytraria, four of which 
are peculiar to the first. But three genera are recorded from the Ethiopian, Oriental, 
and Australian regions. 
TRACHELIUM. 
Trachelium, Herrich-Schiffer, Wanz. Ins. ix. p. 274 (1851); Stal, Ofv. Vet.-Ak. Férh. 1867, 
p. 542; En. Hem. iii. p. 88 (1873). 
In this genus the basal joint of the rostrum is shorter than the head, which, from the 
eyes, is elongated, straightened, and narrowed to the base. The lateral angles of the 
pronotum and the apex of the scutellum are strongly spinous. Only two Brazilian 
species have hitherto been recorded ; a third, from Guatemala, is here described. 
1. Trachelium albo-apicatus, n. sp. (Tab. XVI. fig. 2.) 
Pale fuscous. Antenne with the three basal joints subequal and concolorous ; fourth longest, white, with the 
apical half black ; apical margin of corium levigate and white, with the apical angle black. Underside 
of body concolorous; a white levigate spot near hind cox; disk of third and whole of fourth segments 
of abdomen luteous, with the apical margins black. Legs concolorous; apical joints of tarsi dark fuscous. 
Head distinctly punctate. Pronotum coarsely punctate and subgranulose, with a levigate callosity near 
anterior margin and a central raised longitudinal line; lateral spines long, slender, subacute, and suberect. 
Scutellum coarsely punctate, with the apex produced into a long, slender, erect spine, slightly inclined 
backwards. Clavus and costal margin of corium thickly and coarsely punctate, and a few scattered coarse 
punctures on disk of corium. Connexivum concolorous, with some marginal subquadrate fuscous spots. 
Long. 11-12 millim. 
Hab. Guatemata, San Gerénimo (Champion). — 
CYDAMUS. 
Cydamus, Stal, Rio Hem. i. p. 33 (1860); Ofv. Vet.-Ak. Férh. 1867, p. 542; En. Hem. iii. 
p. 88 (1873). 
Cydamus has the basal joint of the rostrum as long or longer than the head, and also 
differs from the preceding genus in not having the head elongated, straightened, and 
narrowed behind the eyes. The lateral angles of the pronotum are produced and 
spinous. 
This is a purely Neotropical genus; and the following species here described is at 
present its most northern representative. 
1. Cydamus borealis, n. sp. (Tab. XV. fig. 11.) 
Pale ochraceous, punctured with fuscous. Antenne concolorous; apex of the first and apical joint (excluding 
base) fuscous ; basal joint slightly passing apex of head; second and third subequal, together about 
equalling the length of the fourth joint. Head and pronotum with two central longitudinal series of 
dark punctures situated a little apart. Pronotum with a few more scattered punctures on disk, and an 
obscure submarginal series of the same on each side; lateral-angular spines slender, pale, suberect, 
