262 ICHNEUMONID.E. 



Table of Tribes. 



1 (2) Scutellum quadrate, apically produced ; face 



scutate METOPIIDES, p. 262. 



2 (1) Scutellum triangular, not produced; face 



not scutate. 



3 (4) Abdomen strongly fusiform and elongately 



petiolate SPJIIKCTIDES, p. 272. 



4 (3) Abdomen not strongly fusiform, usually 



sessile. 



5 (6) Upper rnandibular teeth apically bifid .... EASSIDES, p. 274. 



6 (5) Upper mandibular teeth entire. , 



7 (8) Face very strongly protuberant; body 



convex EXOCUIDES, p. 289. 



8 (7) Face normal ; body deplanate or but slightly 



convex TRTPHONIDES, p. 311. 



It may perhaps be of use in the case of bred specimens to add a 

 table of the hosts to which the above tribes are generally supposed 

 to be more or less exclusively attached: 



METOPIIDES are usually parasitic upon BOMBYCID^; (Lepidoptera). 

 SPHINCTIDHS are usually parasitic upon COCHLIOPODID^ (Lepidoptera). 

 BASSIDES are usually parasitic upon SYHPHIDJE (Diptera). 

 EXOCHIDES are usually parasitic upon TORTRICIDJE (Lepidoptera). 

 TRYPHONIDES are usually parasitic upon TENTHREDINID.S: (Hymen- 

 optera). 



Tribe METOPIIDES. 



The tribe METOPIIDES was divided from the remainder of the 

 TRYPHONINJ*; by Holmgren under the name TRYPHCXNTDES-ASPIDOPI 

 (Sv. Ak. Handl. 1855, p. 98) on account of the apically truncate 

 scutellum, the apical angles of which are produced, but this 

 characteristic is lacking in one of our Indian genera, which was, 

 nevertheless, included here by Dallu Torre in 1901, doubtless on 

 the strength of its author's remarks, quoted below. Upon these 

 we must for the present rely, since he further gives us the bare 

 details that in one species the petiole is " very smooth and 

 shining " and, in the other, part of the petiole and the two apical 

 segments are " thickly covered with pale hair " ; and this but 

 poorly represents the very distinctive sculpture of the typical 

 genus Metopius, Panz. (q. v. post). 



Table of Genera. 



1 (2) Scutellum apically constricted ; abdomen [p. 263. 



basally subpetiolate SCALLAMA, Cam., 



2 (1) Scutellum quadrate ; abdomen not basally 



constricted. [p. 265. 



3 (4) Antennae filiform ; abdomen parallel-sided. METOPIUS, Panz., 



4 (3) Antennae subdavate; abdomen fusiform .. CULTRARIUS, Davis, 



[p. 270. 



