AGAONID^. 61 



triangular; scutellum rhomboidal. Metathorax large. Abdomen 

 sessile, as long as the thorax and much broader ; first segment 

 slightly contracted ; the following part oval, apparently composed of 

 four segments. Oviduct tubiform, about half the length of the 

 abdomen. Legs slender, moderately long ; hind coxae long ; hind 

 femora iucrassated, shorter than the hind tibiae, which are slightly 

 setose ; claws and pulvilli large. Wings rather narrow, moderately 

 long ; humerus extending to half the length ; ulna about one-fifth of 

 the length of the humerus ; radius none ; cubitus descending 

 abruptly to the disk, much shorter than the ulna. 



In the description of the antennae the two minute, and sometimes 

 obsolete joints following the second are not mentioned. 



Neuter ? Corpus breve. Caput transverse, brevi-ellipticum, pro- 

 thorace multo latius. Antennae 8-articulatae, breves ; articulus lus 

 valde incrassatus. Mesothoracis segmenta non bene determinata. 

 Abdomen brevissimum ; cerci duo apicales. Femora incrassata. 

 Tibiae dilatatae, clavatse. Alae nullae. 



Worker f — Body short. Head much broader than the prothorax, 

 transversely short-elliptical, its sides rounded and its breadth some- 

 what exceeding its length. Mandibles and eyes like those of the 

 female. Antennae slender, 8-jointed, about as long as the breadth of 

 the head; first joint much incrassated, as long as all the other joints 

 together ; second clavate ; third and following very short. Meso- 

 thorax a little narrower than the prothorax, much less developed than 

 that of the female, the sutures between its dorsal segments and its 

 lateral parts not being apparent. Metathorax much uarrower than 

 the mesothorax. Abdomen as broad as the metathorax, as long as 

 the prothorax, with two apical appendages which equal it in length 

 and resemble the cerci of the Dermaptera. Femora incrassated. 

 Tibiae dilated, clavate, as long as the femora. Tarsi slender, shorter 

 than the tibiae. 



This genus has long curved mandibles, like those of Scleroderma, 

 and has some resemblance to Apocrypta and Sycocrypta in the 

 structure of the abdomen, and is more nearly allied to the latter genus 

 than to the former, but it has eyes and wings, and the structure of 

 the veins of these wings show it to be one of the Chalcidiae tribe, and 

 the cubitus descends abruptly to the disk of the wing as in other 

 Agaonidae . 



S. bethyloides. Fcem. — Lutea ; mandibulae fulvae ; abdomen 

 nonnunquam fulvum, apice pallide testaceum ; alae diaphanae, venis 

 pallide testaceis. 



