70 



REV. J. E, HULL ON 



5. Epistome trifid ... 



Epistome denticulate, not divided 



6. Tarsi (ii at least) with apical spurs ... 

 Tarsi not apically spurred 



7. Anal aperture in ventral scutum 

 Anal scutum separate ... 



8. Two dorsal scuta 

 Dorsal scutum undivided 



9. Epigyne triangular 

 Epigyne quadrate 



10. Dorsal and ventral scuta continuous 



,, ,, not continuous 



11. Anal scutum small, rotund 



,, broad, trigonous 



12. Body oblong, dorsal scutum divided (at least 

 Body rotund, dorsum scutum undivided 



Cyrthydrolaelaps. 

 ... Halolaelaps. 

 . . . Pachylaelaps 



7 



9 



12 



xo 

 II 



Gamastis 

 ... Eurypcrasitiis. 

 . . . Ologamasus. 

 . . . Pergamasus. 

 . . . GaDiasolaelaps. 

 12 

 partly) Cyrtoladaps. 

 . . . Sphacrolaelaps. 



MACROCHELES, Ltr. 



Type : marghiaius, Herm. 



The specific characters given below, in the table and 

 otherwise, will perhaps be found to be more 

 valuable than the names, as in one or two cases 

 I have been unable to reconcile the nomenclature 

 of the Italian authors with that of others. 



The genus is well marked by the absence of 

 ambulacra on the tarsi of the first pair, and by the 

 possession of a single dorsal scutum very strongly 

 chitinized and {iniiwims excepted) rough with 

 reticulations. This dorsal scutum is really com- 

 posed of two so intimately welded together as to 

 be indistinguishable in nearly every species ; but 

 indications of the dividing line are sometimes 

 visible in well-marked individuals, and always 

 plain to see in superbns and minimus. 



Dorsal scutum finely ]5unclared, not reticulate ... iiiiiiiinns. 

 ,, reticulate (at least in part) ... ... 2 



Epistome with elongate undivided process ... ... 3 



,, with forked process (usually on a forked 



base) ... ... ... . . ... ... ... A 



