8 



having- only ten joints to the antennae. In the other groups they 



are distinguished as follows : 



Subcostal and radial veins distinct, but no median, submedian 

 or discoidal cells clearly defined ; labial palpi 2-iointed. 

 stigma very large Aphclopinae 



Basal cells generally and frequently discoidal cells distinct or 

 if the basal cells are defined only by hyaline nervures the 

 the stigma is narrow or lanceolate Dryiniiiae 



Stigma large and more or less ovate ( labial palpi 3-joint- 

 ed ) Antcoiiini 



Stigma narrow or lanceolate, labial palpi 2- or 3-jointed. 



Labial pali)i 3-jointed ; head never so strongly excavated pos- 

 teriorly Dryiniiii 



Labial pal])i 2-jointed : head alwa}s deeply emarginate pos- 

 teriorly Gonatopodini 



The males of the Antconini are further generally easily sepa- 

 rated by the rather difi:'erent nature of the insertion of the scape 

 of the antennae on its basal pedicel. The males of Dryinini and 

 Gonatopodini are sometimes extremely similar, so that males 

 of Dryinns and Goiiafopiis have been described by Ashmead 

 under one Genus Labco. This latter genus was characterized 

 by Haliday as having short palpi, the maxillary three-jointed. I 

 have males of Goiiafopiis s. I. with these characteristics, but 

 Labeo of Kieffer is placed in his table under genera with "palpes 

 maxillaires longs" and "palpes maxillaires de cinq articles." He 

 remarks further that I state that the male of Gonatopus s. I. 

 (i. e. Labco s. /. ) has bare eyes, 1)ut I find no such statement 

 of mine, and have always known the eyes to be conspicuously 

 hairy. As to Chalcoi^onatopiis, I have discriminated this by its 

 longer pal])i, the laliials being three-jointed, whereas the males 

 of Gonatopus s. 1. in bulletin I (p. 22 and p. 33) are shown to 

 have shorter pal])i and the labials only two-jointed. Consequently 

 the foot-note in Kiefi'cr's work, p. 13, should be deleted. The 

 male of Chalcoi^onatopns was not described at length because it 

 could not be with certainty referred either to C. optabilis or C. 

 dccoratus ( though doubtless belonging to one of these ) , and I 

 did not care to give it a name, destined to become a synonym. 



The structure of the thorax of the Dryinidac has been mis- 

 understood both by Ashmead and Kieft'er. Thus the latter, in 

 referring to the Dvyininac. in which the posterior pronotal angles 



