INSECUTOR INSCITI.E MENSTRUUS 79 



deep, the posterior scales a little larger. Air-tube moderate, 

 gently tapered, the pecten to about one-third, the outer teeth a 

 little longer, tube about eight times as long as wide at base. 

 Five pairs of hairs tufts along posterior margin, much dislo- 

 cated, short and fine, decreasing in length toward apex. 



The following genitalic table will separate the species here 

 noticed. 



1. Inner division of lobe of side-piece single, with two distorted ap- 



pendages and a thin membrane taeniopus Dyar & Knab 



Not so formed, the two filaments more or less separated 2 



2. Clasp-filament with a horn-like tuft before tip; terminal spine 



uniform 3 



Without this structure, the terminal spine generally widened and 

 appendiculate 5 



3. Anterior crest of clasp of appressed or consolidated spines 4 



This crest composed of fine hairs anips Dyar 



4. Terminal spine of clasp stout ; anterior crest solid, 



erraticus Dyar & Knab 

 This spine delicate ; anterior crest of compressed spines, 



peccator Dyar & Knab 



5. Second plate of unci without a third point 6 



This plate with a third point on stem or subapically 12 



6. This plate simple with furcate tip 7 



This plate with a triangular membrane from one limb, crossing the 



other and bent down terebor Dyar 



7. Outer division of lobe of side-piece with a long filament from the 



base 8 



Without this structure 9 



8. Filaments at apex of this lobe triangularly leaf -like. .y&ar»Mi.y Dyar 

 A large triangular leaf and several long setae, 



alcocci Bonne-Wepster & Bonne 



9. Outer division of lobe of side-piece with a leaf -like appendage.. 10 

 Without this structure 11 



10. This lobe with a slender inner arm, the leaf from the base of this, 



ribbed conspirator Dyar & Knab 



This arm short ; leaf large, triangular, arising from among the outer 

 group of setae nicceriensis Bonne-Wepster & Bonne 



11. One limb of the second uncal plate denticulate, 



saramacensis Bonne-Wepster & Bonne 

 Both limbs of this plate smooth elevator Dyar & Knab 



12. Second uncal plate serrate on the margin between the limbs 13 



Without serrations between the limbs 15 



