456 



On learning from me that I had in my collection a remarkable form 

 from South America, he requested me to draw up a diagnosis of it, so 

 he could incorporate it in his tables, and which I have accordingly done. 

 This Encyrtid, fortunately in both sexes, was discovered in a collection 

 of South American Chalcididae placed in my hands to work up nearly 

 two years ago by that indefatigable collector, Herbert H. Smith, and 

 is only one of several varieties in the collection. 



IS"ot alone the six-branched antenncne in the male, but the fact that the 

 antennae in both sexes are inserted on the middle of the face make it 

 a unique in the group, as all other described species, so far as I know, 

 have fhe antennae inserted close to the mouth. The abnormally length- 

 ened first funiclar joint in the female is also a remarkable character. 



The characters separating this genus from other genera of the Encyr- 

 tinae may be derived from the following diagnosis : 



Hexacladia gen. no v. 



Head very broadly transverse, including the eyes, mucli wider than the thorax, the 

 face full convex, the space between the eyes and the mandibles longer than the 

 length of the eye. Eye broadly oval, bare. Ocelli three, rather close together and 

 subtriangularly arranged. Labrum very small, transverse, twice as wide as long. 

 Mandibles very small, oblong, truncate at tips, bidentate. Maxillary palpi rather 

 long, five-jointed ; labiales short, three-jointed. Autennse in both sexes eleven-jointed, 

 inserted on the middle of the face, the scape long, cylindrical, projected far above the 

 vertex; in the male (Fig. 35) the six fuuicle joints each furnished with a loug hairy 

 ramus, the basal one being the longest, the others gradually diminishing in length to 

 the last; the first funicle joint is very short, the following all long, at least thrice 

 longer than the first ; club long, fusiform, three-jointed. In the female the flagel- 

 lum is subclavate, the first fuuicle joint being remarkably long, almost as long as the 

 five following joints together; the last five fuuicles are short and very gradually 

 increase in length and width to the clubj the latter composed of three joints. The 

 thorax in the male is strongly developed, highly convex, resembling somewhat an 

 Eucharid; in the female less strongly developed. Mesonotum transverse, smooth, 

 polished, without trace of furrows. Scutellum longer than wide, rounded behind 

 and highly convex. Axillae transverse, convex. Metathorax short, smooth, the 

 spiracles very large, rounded. Middle legs slightly the longest, their tibiae long, 

 slender, cylindric, about one-third longer than the tarsi, the spiir more than half the 

 length of the basal tarsal joint, the tarsi stouter than the posterior tarsi, the joints 

 after the first very short. The posterior femora and tibias are slightly dilated, the 

 tarsi slender, cylindrical, and almost as long as the tibiae. 



Abdomen, in both sexes, is small in proportion to the thorax ; in the male it is long, 

 oval, composed of seven segments, the first much the longest, the others short, all of 

 about an equal length ; in the female it is subcompressed, composed of six segments, 

 the hypopygium being plowshare shaped, the ovipositor slightly exserted ; as in the 

 male, the first segment is the longest. 



Wings banded; the submarginal attains to the middle of the wing before jointing 

 the costa, the costal cell being somewhat wide; the marginal vein is thickened and 

 a little longer than the stigmal ; the stigmal clavate curved upwards ; the postmar- 

 ginal is longer in the male than in the female. 



