20,1 Kieffer: Philippine Serphide (Proctotrupidz) 69 
Thorax almost three times as long as high, sublinear. Pro- 
notum quadrangular, transverse, slightly convex. Mesonotum 
as long as pronotum, quadrangular, with continuous, parallel, 
widely separated parapsidal furrows. Mesopleura coarsely, 
scatteredly punctured. Scutellum transverse, two-thirds as long 
as mesonotum, quadrangular. Metanotum lacking. Median 
Segment opaque, irregularly rugose, not edged, but convex later- 
ally and posteriorly, strongly transverse, as high and as broad 
as pronotum and mesonotum; two oblique longitudinal strize 
from anterior margin to posterior margin, where they join, 
forming two tiny teeth. 
Wing faintly fuscous, subcostal lying close to costal, ptero- 
stigma narrow, lanceolate, longer than the short postmarginal, 
radial very short, only two-thirds as long as basal, extended 
almost to the anterior margin by a long, curved, pale vena spuria, 
basal oblique, arising in the thickened end of subcostal, trans- 
versal vertical, half as long as basal, medial reaching beyond 
the basal cells and thus bordering an outer submedian cell above, 
the two other veins (distal and posterior) bordering it very 
pale, discoidal continuous, cubital extinct anteriorly, distinct in 
the distal two-thirds; hind wing shortly lobed, without veins. 
Legs bare, femora slightly thickened, tarsi slender, 5-jointed. 
Abdomen rather flat, elliptic, somewhat shorter than thorax, 
shaped as in the preceding. 
Length, 2.8 millimeters. 
MINDANAO, Butuan. 
A dead ant was found firmly attached to the ventral surface of 
abdomen. This ant was 1.2 millimeters long, pale yellow; head 
(exclusive of the quadridentate mandibles and the eleven-jointed 
antenna) ‘and abdomen (exclusive of petiole and the two knots) 
black; head quadrangular, somewhat elongate, broader than 
abdomen ; mandible nearly half as long as head; third to eighth 
joints of antenna transverse and equally thin, ninth to eleventh 
thickened, eleventh as long as the six preceding ones combined. 
Cladobethylus cruciger sp. nov. 
Male.—Metallic blue. Head coarsely and rather closely 
punctured, as broad as thorax. Mandible yellow. Cheek with 
a deep furrow, half as long as eye, smooth, black and shining, 
like the anterior part of temple. Eye broader than frons, almost 
reaching posterior margin of head. Ocelli forming an equi- 
lateral triangle, the posterior ones separated from eye by their 
diameter, from each other by twice their diameter, lying almost 
opposite middle of eye, more than twice as far from posterior 
