264 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



Type locality. — Coleta, Alabama. 



OtJi-er localities. — Pyziton, Clay County; and Langdale, Chambers 

 County, Alabama. 



Subfamily Tryphoninae. 



Genus PHTHORIMA Foerster. 



Only one North American species, PhtJiorima horealis Ashmead,* 

 has been referred to this genus. This species is not Diplazonine. I 

 would place it in the Tryphonini, where it runs fairly satisfactorily in 

 Ashmead's Key to Gastroporus Foerster, to which no species has as 

 yet been assigned and to which I somewhat doubtedly refer it. 



But two species from the United States have recently been found 

 in the miscellaneous undetermined material in the National Museum 

 and are described herewith. Of one of them Mr. H. L. Viereck has 

 reared four specimens, which he has generously permitted the writer 

 to add to the meager material already at hand. These specimens 

 emerged from aphid galls on witch-hazel, where they were presumably 

 parasitic on some species of Sj^rphid fly. The strongly compressed 

 and extensible abdomen is evidently an adaptation for oviposition in 

 the peculiar situation where its host lives. 



(PHTHORIMA) GASTROPORUS? BOREALIS (Ashmead). 

 PHTHORIMA EXTENSOR, new species. 



Female. — Length, 8.5 mm.; abdomen, 6 mm. (in an extended speci- 

 men of same size as much as 9 mm.); antennae, 4.5 mm. 



Head strongly narrowed behind eyes; vertex very minutely coria- 

 ceous, subopaque; frons and face shining, minutely punctate; 

 malar space scarcely as long as basal width of mandible and without 

 a distinct furrow; clypeus flat with a narrow refiexed margin, trun- 

 cate at apex, punctate; thorax above densely, finely punctate; 

 pronotum shining, sparsely punctate above, coriaceous below; meso- 

 pleurum polished, sparsely, minutely punctate; sternum more 

 densely so; sternauli broadly impressed; metapleurum opaque, 

 punctato-rugulose; propodeum irregularly rugulose, especially on 

 posterior face, the carinae indistinct, the posterior face not especially 

 precipitous; areolet, sessile; nervulus strongly postfurcal; nervellus 

 strongly broken not far below middle; compression of abdomen em- 

 bracing more or less of second tergite, which is strongly sculptured only 

 at base and scarcely half as wide at base as long; first tergite dis- 

 tinctly wider from base to spiracles than beyond; little more than 

 half as wide at apex as long. 



Black; middle of face, a larger or smaller spot at each side of clypeus, 

 mandibles, palpi, a cuneiform spot on each side of mesoscutum adja- 



1 Proc. Wash. Acad. Sci., vol. 4, 1902, p. 226. 



