128 Mr. S. A. Rohwer on new 
and submarginal veins subequal in length. Black, antenns 
and legs below coxe pale brown, the tibie and tarsi some- 
what yellowish ; wings hyaline; venation very pale brown. 
Type-locality. ‘—Coimbatore, South India. 
Type.—Cat. No. 20,982, U. S.NM. 
Described from a single female received from Ramakrishna 
Ayyar under his number 28* and labelled: “ From gall. 
25.vi.13. T. V.R. Coltor.” Right antenna on slide 882. 
Genus Tetrasticuus, Haliday. 
In placing the following species the writer has used the 
genus Tetrastichus in a very much broader sense than 
certain other students. The present liberal interpretation 
of the genus, while perhaps not in accord with the modern 
conception of a genus, is preferred to the limiting of 
“ genera’ on such variable and uncertain characters as the 
number of ring-joints or the number of “ club-joiuts.” In 
both of these so-called characters there is much chance for 
error, and much depends on the preparation of the slide 
mount of the antenna. It is, however, not to be construed 
that the author believes that all of the segregates of 
Tetrastichus are synonyms. Some of them are undoubtedly 
valid, but, until they can be redefined by more reliable 
characters, it will only add to the present confusion by 
definitely assigning species to them. To show where each 
species would fall in the recent tabulations, a statement of 
the group to which it would run in the diagnosis of the 
genera of Tetrastichine Eulophide, given by Girault f, is 
added as a preface to each description. 
Besides the species here described, the sending contained 
a single female specimen of a yellow species reared at the 
same time as TJetrastichus coimbatorensis and sent under 
the same number. This yellow species seems to be new, 
but more material is needed before reaching a decision. 
Tetrastichus okawus, sp. n. 
Belongs, according to the generic key by Girault, to 
Quadrastichus. Compared with the other Indian species 
this is more closely allied to Tetrastichus coimbatorensis, but, 
besides the antennal and colour characters, can easily be 
distinguished by the presence of a median line on the scutum. 
* Eurytoma dentipectus, Gahan, and Neanastatus pulchricorpus, Girault, 
were received under the same number. 
+ Memoirs Queensland Mus. vol. ii, 1918, p. 249. 
