ICHNEUMONID GENERA LABIUM AXD PCECILOCRYrTUS. 



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bear a strong .superficial resemblance to species of this genus. 

 T. ahdomiiialis Gaer. and Eirone celsissima Turn., both of which 

 look like Labium, occur on Mt. Wellington at a considerable ele- 

 vation, where Labium montivagwm is very plentiful. E. celsissima 

 even has the apical antennal joints yellow, a most abnormal 

 coloration for one of the Thynnidie. 



Kei/ to the ^Species of Labium. 



1. Aiiteniia3 not more than 30-jointed 2. 



Autennie more than SO-jointed 4. 



2. Second recurrent nervure only feebly bent in the 



middle ; nervellus straight, discoidella want- 

 in^: ; head, thorax, and median segment black 



with 3'ellovv markings L. ivalkeri, sp. n., Si P- 4. 



Second recurrent nervure sharply angulate in 

 the middle, nervellus angulate, discoidella not 

 wholly wanting ; head, thorax, and median 

 segment fulvo-terruginous, with yellow mark- 

 ings 3. 



3. Discoidella reduced to a short slump, originating 



halfway between the submediella and the 

 middle of the nervellus ; median segment 



yellow apically L. centrale, sp. n., p. 6. 



Discoidella complete, originating much nearer to 

 the middle of the nervellus than to the sub- 

 mediella; median segment entirely fulvo-fer- 



riiginous L. brevicoriie, sp. n., p. 6. 



4. Face and clypeus fused, in the same plane, the 



dividing-line obsolete ; more or less pilose 5. 



Face and clypeus not entirely fused or in the 



same plane ; scarcely pilose 6. 



5. Strongl.y pilose ; hind femora and median seg- 



ment black L. pilosmn, sp. n., p. 10. 



Feebly pilose; hind femora and median segment 



fulvo-ferrugiuous L. subpUosuliim, sp. n., p. 11. 



6. Hind empodia small, not more than one-third of 



the length of the tarsal ungues; mesonotum 



with a l)road black fascia on each side L. bivittatum, sp. n., p. 8, 



Hind empodia elongate, at least two-thirds of the 

 length of the tarsal ungues ; mesonotum with- 

 out black lateral fasciai 7. 



7. Mesonotum opaque, closely and coarsely punc- 



tured ; dentiparal area produced into a broad 



well-developed tooth 8. 



Mesonotum shining, smooth or finely punctured; 

 dentiparal area unarmed, or at most with an 

 inconspicuous tooth 9. 



8. Scutellum and postscutellum yellow L. petitorium Erichs., p. 7. 



Scutellum and postscutellam ferruginous X. petitot'inm, subsp. con- 



9. Flagellum of the antennai wholly black above, [color, subsp. n., p. 8 



without pale apical joints ... 10. 



Flagellum, if black above, then always with 

 fceveral of the apical joints conspicuously fer- 

 ruginous or ochraceous 11. 



10. Mandibles very long and straight, vertical ; 



dentiparal area with a small, but distinct 



tooth at the external apical angle L. vasseaniim, sp. n., J, p. 13 



Mandibles normal, not elongate ; dentiparal area 



unarmed L.ferrujiueum Cam., p. 19. 



11. External area of the median segment more 



coarsely sculptured than the dentiparal area ; 

 external subopaque, finely and closely punc- 

 tured, dentiparal smooth and shining 12. 



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