162 Timehri. 
Rodwayia balieata, sp.n. 
Yellow, the antenne, tips of mandibles, the orbits behind the top of the eyet, 
the middle of front and vertex, the latter behind, occiput, the mesonotum except 
narrowly at the base, the line projecting backwards shortly behind on either side 
of the middle, the scutellums, the basal half of the third abdominal segments, the 
whole of the fourth, fifth and sixth, the tarsi and the basal two-thirds of the 
hinder tibiew, black. Wings hyaline, tinged with yellow, the apex with a cloud 
commencing near the apex of he basal third of the apical abscissa of the radius, 
and there is a narrower cloud in the apex of the hind wings, the stigma and ner- 
vures are black. Male. 
Length 13 m.m. 
Smooth and shining, except the transverse striz on tht metanotum, a few 
striz on the apex of the metapleure and the post-scutellum, which is strongly 
longitudinally striated ; the depression at the sides of the latter is strongly 
obliquely striated. 
Rodwayia rufa, sp.n. 
Ferruginous, the flagellum of antenne, the mandibular teeth, the apical 
third of the hind tibie and the hind tarsi black ; the face, clypeus, malar space, 
lower outer orbits and the inner narrowly below, pallid yellow, the palpi of a 
deeper yellow colour ; the under sides of the basal joints of flagellum ef a darker 
red ; wings hyaline, the apex with a fuscous violaceous border, commencing 
shortly behind the middle of the apical abscissa of the radius ; the costa, stigma 
and nervures black, the middle area on base of metanotum distinctly obliquely 
narrowed towards the apex; the part from the keel to the apical slope strongly, 
closely transversely striated ; the top of the apex finely, irregularly longitudinally, 
the rest more closely and regularly transversely striated. Petiole smooth, the 
post-petiole with some weak scattered punctures, a fovea in the middle ; the 
second and third segments finely, closely punctured, the others smooth, the first 
segment is of a brighter colour than the others. Male. 
Length 13 m.m. 
CrYPTIN® MESOSTENINI. 
Mesostenus quyanaensis, sp.n. 
Black, the post-scutellum and the parts bounding it, apex of mesopleure 
narrowly in the upper half, widely on the lower, where the red extends to the 
middle and the whole of the metathorax red, the antennal scape, the greater 
part of the post-petiole, the apical third of the second abdominal segment, 
and the apical half of the third, yellow tinged with red; a line on the upper 
inner orbits, the clypeus, mandibles except the teeth, palpi, tegule, tubercles 
and scutellum, whitish yellow; the basal three or four joints of the flagellum 
brownish. Legs : the four anterior fulvous, the cox, trochanters and base of 
middle tibie whitish yellow, the femora more rufous in tint than the rest ; the 
hind legs black, the femora broadly rufous in the middle, the base of the 
tibiw, the apex of the basal joint of the tarsi and the whole of the second 
and third white wings hyaline, the apex with fuscous border, commenc- 
