24 ICHNEUMOXID.E. 



tubercles of the former replaced by more or less even and distinct 

 punctation. The AOKNITIDES, though well distinguished by the 

 characters indicated, do not appear to be by any means a natural 

 group but to contain very incongruous species ; and, provided 

 that the HEMIGASTEIDES were correctly understood by Cameron 

 (of which neither he nor I am satisfied), these two tribes might 

 with advantage be united. The BANCHIDES have at different 

 periods been placed in the OPHIONIJLE, TKYPHONIN-*: and the 

 present subfamily, where they appear to me less out of place 

 than elsewhere, though at once known from the remainder of the 

 ICHXEUMOXID^E by the peculiarly arcuate, sessile body and the 

 large, rhomboidal alar areolet. 



Table of Tribes of PiMl'LlN^. 



1 (10) Areolet not large and rhomboidal; terebra 



usually elongate. 



2 (5) Hypopygium reaching the compressed anus 



and covering base of terebra. 



3 (4) Basal segment petiolate, with spiracles be- 



yond its centre Hemigastrides, 



4 (3) Basl segment subsessile with spiracles at or [p. 24. 



before centre Acanitides,}*. 39. 



5 (2) Hypopygium reaching neither the depressed 



anus nor base of terebra. 



6 (7) Head cubical and not constricted posteriorly ; 



mandibles prominent Xoridides, p. 57. 



7 (6) Head transverse : usually constricted pos- 



teriorly ; mandibles normal. 



8 (9) Abdomen distinctly impressed or tuberculate, 



strongly punctate Pimplides, p. 83. 



) (8) Abdomen not impressed nor tuberculate, 



usually finely punctate Lissonotides, 



10 (1) Areolet very large and rhomboidal; terebra [p. 215. 



hardly exserted 



Tribe HEMIGASTEIDES. 



A small group composed of the two genera, Ifemiyaster and 



Macrogaster, was erected by Ashmead in 1900 for species which he 



considered most closely allied to the CRTPTIXI and the MESO- 



MNI, among the CRTPTIN.E, from any of which it very materially 



iiffers, however, in the entire absence of the alar areolet and in 



shape of the stigma, which is narrow and lanceolate. In 



8 two genera, he says, the marginal cell is subelongate and 



itends nearly to the apex of the wing, and the single submarginal 



lervure is short but distinct, and is emitted from the cubital 



e before the second recurrent nervure. 



ibsequeutly Cameron published his genus Arthula, which he 



nsidered most closely related to the TRTPHONIN*;, and at the 



time gave the following table of genera, though in 1899 



