1922] Hymenopterous Genus Harpagocryptus and its Allies. 103 



gocryptus and Nealgoa are evidently more closely similar, 

 although many characters which might be useful are not given 

 by Bridwell, and were it not for the great geographical separation, 

 I should hesitate to propose a new genus for the North American 

 species. 



The characters which appear useful in differentiating the 

 four genera follow. 



Olixon Cameron. 



Biol. Centr.-Americana, Hymenoptera, vol. 1, p. 412 (1887) 

 Kieffer. Bull. Soc. Sci. Bruxelles, vol. 35, p. 216 (1911) 

 (Saphobethylus) 



d^ . Head transverse, wider than the thorax. Antennae 

 a little shorter than the body; first joint of flagellum one-half 

 longer than second, all flagellar jo'nts long, at least four times 

 as long as thick; antennae inserted below the lower margin of 

 the eyes; malar space with a black carina connecting the eye 

 and mandible; cheeks half as long as the eye. Mandibles curved, 

 pointed and without tooth. Eyes almost attaining the posterior 

 margin of the head. Prothorax a little longer than wide, bulging 

 laterally in front. Anterior wing reaching to the base of the 

 abdomen, without venation or stigma. Propodeum as long as 

 the prothorax, its hind angles acutely toothed. Tarsal claws 

 with a small tooth near tip. Third segment of abdomen a little 

 shorter than the first. External genitalia consisting of a median 

 stylet between a pair of parallel, upturned, filiform projections. 



Harpagocryptus Bridwell. 



Proc. Hawaiian Entom. Soc, vol. 2, pp. 34 (1908). 



9 . Head transverse, wider than the thorax, occiput 

 arcuately emarginate. Antenna? elongate, slender, much longer 

 than the head and thorax together; second and following joints 

 of antennae subequally elongate, many times as long as thick; 

 first joint shorter than second; pedicel very short, but evidently 

 longer than wide. Mandibles with a long apical tooth and three 



