462 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



Head brown, eyes deep black and stalked; antennae light brown, 

 somewhat darker at base, the first joint enveloping the second, third 

 and fourth ensiform, the terminal joint somewhat surpassing the 

 third. Antennae twice as long as the head. Mandibles transparent, 

 brownish at base, someAvhat arcuate, acute, about a fourth longer 

 than the maxilla. Maxilla consisting of basal piece and rudimentary 

 palpus. The basal piece is relatively long, the palpus is only about 

 one-third as long as the basal piece. Thorax dark brown, except 

 postlumbium which is light brown. Postlumbium one-third as long 

 as broad. Elytra somewhat longer than mesothorax. Wings reach 

 almost to the tip of the metatarsus. Wings with seven veins arising 

 from base. Costal area strong. Radius broken before the middle, 

 strengthened beyond the break. Between radius and medius is one 

 isolated branch. Between medius and cubitus, quite close to the 

 apex of the medius lies a second detached vein. Oedeagus with 

 basal angle rounded, greater than a rectangle, apex bent with a 

 sliarp edge, making an angle of over 45°. 



Female. — Length of cephalothorax, 1.94 mm. ; greatest breadth of 

 thorax 1.62 mm., which is greater than the distance from the outside 

 of one spiracle to the outside of the other. Brood canal opening, 

 0.46 mm. ; its distance from apex, 0.18 mm. Openings of the brood 

 canal, 4. Cephalothorax very dark except the anterior portions. 



I'Hungulinid. — Length exclusive of apical stylets 0.33 mm.; 

 breadth of abdomen, 0.11 mm. ; length of head, 0.05 mm. ; length of 

 stylets, 0.16 mm. The pro- and meso- thoracic legs bear an apical 

 pulvillus in the form of a disk; while the posterior legs have a 

 pulvillus that is ladle form. The last three segments are different 

 from the preceding and laterally provided with spines (Hoffman 

 figures eleven abdominal segments) . 



The above descriptions are translations from Hoffman. 



18. Genus VESPAEXENOS Pierce. 



LIST OF SPECIES. 



1. y. huyssoni Pierce; parasite of Vespa ducalis Smith; Annam. 



2. V. crdbronis Pierce ; parasite of V. crabro Linnaeus, Japan. 



3. V. moutoni Buysson; parasite of F. mandarina Smith, V. mag- 

 nifica Smith, F. nigrans Buysson ; China. 



19. Genus BELONOGASTECHTHRUS Pierce. 



1. B. zavattarii Pierce; parasite of Belonogaster elegans Ger- 

 staecker; Congo Free State. 



2. Tribe PSEUDOXENINI Pierce. 



Table of genera. 



Female cephiilothorax broadly oval, unevenly rounded from base to apex, 

 broadest behind spiracles; angled at base of tiead, obtusely rounded at 

 apex 20. Pseudoxenos Saunders. 



