296 NEOTROPICAL PSELAPHIDAE 



1890, 1896, and Wickham, 1894, 1900) . Several of the new species subsequently 

 described have been discovered with termites. 



The neotropical genera may be separated by the following key: 



Key to the Neotropical Geneea (PI. XX) 



Tarsi each with long equal to subequal claws 2 



Tarsi each with two short and very unequal claws. . . .PHALEPSUS 



2. Internal face of distal segment of maxillary palpi longitudinally 



sulcate (this sulcus may be broad or narrow; entire or only ex- 

 tending for the apical third) 7 



Internal face never sulcate in any part 3 



3. Distal segment of maxillary palpus widest near apex which is broadly 



convex; this segment has the internal face produced near the apex 

 into a pointed and pubescent process at right angles to the long axis 

 of the segment, and from this point the segment narrows rapidly 



to the base LETHENOMUS 



Distal segment not as above 4 



4. Distal segment of maxillary palpi covered with short, bristling, 



spike-like setae JUXTAHAMOTOPSIS, new genus 



Distal segment nude or with pubescence minute, appressed and in- 

 conspicuous if discernible 5 



5. Distal segment of maxillary palpi with a broad and shallow longi- 



tudinal sulcus for the apical fourth of the dorsal face; pubescence 

 very long and thin with the apical ends of the setae curving in 



various directions to intertwine or mat 



TYROGATUNUS, new genus 



Distal segment and pubescence not as above 6 



6. Pronotum with three free antebasal foveae ; first tergite only slightly 



longer than second TYROPSIS 



Pronotum with antebasal foveae connected by an arcuate transverse 



antebasal sulcus ; first tergite longer than next three united 



NEOTYRUS 



7. Pronotum with an entire transverse antebasal sulcus 8 



Pronotum without a transverse antebasal sulcus 12 



8. Distal segment of maxillary palpus less than half as wide as long. ... 9 

 Distal segment nearly three-fourths as wide as long, semicircular in 



outline PSEUDOHAMOTUS 



9. Third (next to last) segment of maxillary palpus perfectly globular 



APLODERINA 



Third segment not globular 10 



10. Head squarely truncate anterior of eyes, with no antennal tubercle 

 and the antennae widely separated at the corners of the sub- 

 rectangular front HAMOTOCELLUS 



Head narrowed anterior of eyes, with antennae articulated upon a 

 more or less bilobed and median frontal tubercle 11 



