10 
Indian Forest Records. 
[VoL. IX 
Genus Trigonura Sich. 
Trigonura ruficaudis Cam. (Fig. 6). 
Oentrochalcis ruficaudis Cameron, Ind. For. Rec., IV., Pt. II, 
p.,2 1913. 
There is a double confusion in the original generic placing of the above 
species. (A) Cameron erected Centrochalcis (loc. cit.) for this true Chal- 
cidine form, ignoring the fact that he had already (Zeitschr. f. Hymn. 
Dipt. p. 230, 1905) used the name for a Haltichellid species. If Centro- 
chalcis therefore is to stand at all it must be in the latter family ; (B) 
apart from the name being preoccupied Centrochalcis (1913) appears 
to me to have been unnecessarily created. Cameron recognised that the 
insect presently under discussion runs down to “ near Trigonura and 
Thaumatdla (sic.)” (l.c.) presumably Thaicmatdia, but apparently 
thought it needless to discuss the claims of these genera on the ground 
that they are Neotropical. I have elsewhere queried the soundness of 
this reasoning (Bull. Ent. Res. Vol. VI, Pt. IV, p. 384, 1916) and a more 
thorough examination of C. ruficaudis made possible by the material 
mentioned below, left me convinced that Centrochalcis Cam. (1913) 
must be an exact synonym of Trigonura Sich. Mr. Crawford, who 
subsequently kindly examined a female at my request, is of the same 
opinion. The synonymy of Centrochalcis therefore reads 
Family Haltichellid^. 
Centrochalcis Cam. (1905). 
Family Chalcidid^ sens. str. 
Centrochalcis Cameron (1913) Trigonura Sichel, (1865) nec. 
Cameron (1905). 
Some additional notes and corrections may be made on Cameron’s 
description : 
Head. Mandibles tridentate (Fig. 6, h), similar : labrum small, with 
10 major bristles connected with sensorial channels and some others more 
minute. Trophi. Maxillse ; stipes with over 40 bristles behind the palpus 
and 6 much longer in a transverse row towards the mid line. Joints of 
palpus in ratio 3 ; 5 : 41 : 9. The second joint broad (2) at apex. About 
16 sensory spines fringing lingua. The mentum bears only 2 central 
bristles just behind the palpi. The surface both of the stipes and mentum 
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