BARBADOS-ANTIGUA REPORTS 31 
thtide (Saldide), and going through Ochteride, Gelastocoride, 
Naucoride, and Belostomatide to the Corixide, the most special- 
ized, and possibly, the most aberrant of these groups in the 
series. The Notonectide do not seem to fit in this linear ar- 
rangement and may temporarily be regarded as in the nature 
of an off-shoot. The Gerride and Mesoveliide are respectively 
connected with the Reduviide and the Nabide, and may be 
placed in that linear order, although not related to each other. 
Family Corixide 
Arctocorisa antiguensis n. sp. 
Description—Head: Tumid, with a blunt median longitudinal carina in 
the male; eyes 4/5 as wide as the vertex; face flat in female, foveate in 
male. 
Pronotum: Rastrate, more or less oval, anterior margin straight; with 
8 or 9 black lines crossing it, sometimes interrupted; proportion of length 
to width, 3 to 7. 
Tegmina: Clothed with long, fine prostrate hairs; clavus rastrate, also 
apical part of corium. Membrane without veins, of homogeneous tex- 
ture, with short, fine light hairs; black vermiculate markings, varying in 
intensity with the age of the specimen, lighter toward the apex of the 
clavus, in which they become a few transverse irregular lines. The vermi- 
culate markings coalesce to form longitudinal stripes, more or less pro- 
nounced. 
Pale: In the female, triangular in section and fossate on the face, the 
upper edge and each edge of face closely set with long sete; length to 
width as 10 to 3; middle legs slender, femur nearly equal in length to 
the total length of the tibia, tarsus, and tarsal claw; tarsal claws long, 
slender, slightly longer than tarsus; the length of the tarsus together with 
its claws nearly one and one-half times as long as the tibia. Hind legs 
stout; coxe elongate, stout, somewhat flattened; femora short, stout, 
apically ampliated, set with short stout spines on the outer edge and 
fringing natatorial hairs on the inner; tibie flattened, paddle-shaped, a 
row of moderately long spines on the outer edge, and heavily fringed with 
swimming hairs on the inner; proportional lengths of coxa to femur to 
tibia to tarsus as 18 to 18 to 23 to 9. 
In the male, pale spatulate and curved, usual fringing hairs on lower 
edge, a long row of stout legs on the curved side, a short row on the 
straighter; middle legs slender and cylindrical, coxe small; femur to tibia 
to tarsus to claws as 30 to 16 to 10 to 14; claws simpke, slender. Hind 
legs as in female. Asymmetry to right. 
Females: length, 8.3 mm. to 8.5 mm.; width 3.4 mm. to 3.8 mm. 
Males: length, 7 mm. to 8 mm.; width 3 mm. to 3.2 mm. 
