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3- (4) Maxillary palpi 5-jointed Gonatopus Ljnngh. 



4. (3) Maxillary palpi not 5-jointed. 



5. (10) Chelar claw armed conspicuously with special denti- 



cles similar to those on the fifth tarsal joint be- 

 neath, its lower margin nearly straight on the basal 

 half, not with a sharp subconvex edge. 



6. (9) Pronotum with a conspicuous transverse impression 



before the middle, dividing it into a shorter anterior 

 and longer posterior lobe. 



7. (8) Maxillary palpi 4-jointed .Pseudogonatopns 



8. (7) Maxillary palpi 2-jointed Paragonatopus. 



9. (6) Pronotum without a distinct transverse impression 



(maxillary palpi 2-jointed) Haplogoiiialopus. 



10. (5) Chelar claw more curved, usually with few or no denti- 



cles beneath, or at most with very inconspicuous 

 ones, which are absent from the apical part, the 

 lower edge on the more basal part slightly con- 

 vexly curved, so that the claw is much less parallel- 

 sided than that of the preceding three genera. 



11. (16) Maxillary palpi not 6-jointed. 



12. (15) Anterior trochanters very long, with a longish thin 



basal stalk; head above very distinctly concave 

 from eye to eye. 



13. (14) Maxillary palpi 4-jointed Neogonatopus. 



14. (13) Maxilary palpi 2-jointed Epigonatopus. 



15. (12) Anterior trochanters stout, not very elongate, widen- 



ing from the base, so that there is no long narrow 

 'basal portion; head above not distinctly concave 

 from eye to eye. (Maxillary palpi 3-jointed, the 

 basal excessively small) Pachygonatopns. 



16. (11) Maxillary palpi 6-jointed .Chalcogonatopiis. 



17-a. (17-b.) A distinct suture or impression extending for- 

 wards from the middle eoxae and dividing the pro- 



podeum from the mesothoracic elements 



Chalcogonatopiis s. s. 



17-b. (17-a.) (b) No such suture visible, the propodeal and 



mesothoracic elements fused laterally 



subg. Eiigonatopus. 



18. (2) Mesonotum of ordinary form, species fully winged or 



with rudimentary wings. 



19. (28) Posterior lateral angles of the pronotum not nearly 



attaining the tegulae. 



