20,1 Kieffer: Philippine Serphide (Proctotrupidz) 71 
Cladobethylus cruciger var. antennalis var. nov. 
Male.—Scape brown like flagellum, third joint three times as 
long as thick, fourth only twice as long. Mesonotum as long as 
pronotum. Triangular field of median segment metallic blue. 
_ Distal section of radial forming a distinct, fine vein. Abdomen 
dark red-brown to black-brown. 
Length, 4 millimeters; otherwise like type. 
LUZON, Tayabas, Mount Banahao. 
Cladobethylus ceruleus sp. nov. 
Female.—Like C. cruciger with the following exceptions: Head 
more finely punctured, without smooth longitudinal line or cross- 
line; posterior ocelli not twice as far from posterior margin of 
head as from each other; cheek scarcely one-third as long as 
eye, frontal impression finely cross-striped. Antenna without 
hairs, third joint two and a half times as long as thick, fourth 
longer by a half than thick, the following ones gradually thin- 
ner, twelfth one and a half times as long as thick, thirteenth 
more than twice as long as thick. Postmarginal distinct, thicker 
than radial, somewhat shorter than the proximal section of 
radial, basal sinuate; veins obsolete in C. crucige?, very plainly 
visible in the present species. Triangular field of median 
segment metallic blue; the posterior vertical surface traversed 
by a continuous middle field which is broad and curved-rounded 
above, and narrowed toward the bottom. The entire third 
tergite closely and rather finely punctured. Coloring as in C. 
cruciger. ar Sr ema ee 
Length, 4 millimeters. 
MINDANAO, Butuan. 
Genus ISOBRACHIUM A. Forster 
a. Median segment with 5 longitudinal raised lines. 
I. bipunctatum sp. nov. 
a’. Median segment with 3 longitudinal raised lines. 
I. luzonicum sp. nov. 
Isobrachium bipunctatum sp. nov. 
Female.—Black. Head elongate, finely hirsute, closely punc- 
tured, opaque, much wider than thorax, widest at middle of eyes. 
Eye finely hirsute, short-elliptic, three times as long as cheek, 
as long as its distance from posterior margin of head; posterior 
ocelli touching posterior margin of head; mandible and palpus 
red-brown. Antenna dark-brown, scape black except the distal 
