472 Dr. H. Karny on the 



7. Third and fourth joints of antennae entirely and basal half of 

 fifth yellow ; all the other joints brown. 



9. L. mccunellii, Crawford (Mexico). 

 7'. Third joint of antennae entirely yellow, fourth and fifth only 

 centrally yellow ; all the other joints dark brown. 



10. L. ocellatas, Hood (North America). 

 6'. Antennae dark, only third or also second joint yellow. 



7. Cheeks divergent posteriorly. 



11. L.fasciculatiis, Crawford (California). 

 7'. Cheeks parallel or convergent posteriorly. 



8. Cheeks almost parallel, or only constricted at the extreme base. 



All the prothoracic bristles present. 



9. Two large stout bristles in front of the eyes. 



12. L. inttrmedius, Bagnall (Venezuela). 

 9'. No bristles in front of eyes . 13. i.sij/K^iii, Bagnall (Venezuela). 

 8'. Cheeks distinctly convergent posteriorly. Prothorax with bristles 

 only on the posterior angles and hind margin. 



14. L. elunyatus, Bagnall ( Venezuela). 



Revision of the known species of Hoodia. 



1. Sides of head parallel, or slightly divergent posteriorly. Antennae 

 yellow, except the two first joints ; the last two joints are dark 

 only in the exceptionally dark-coloured individuals. Mouth- 

 cone at first almost rectangularly convergent, apically broadly 

 rounded, . . . \. H. austriaca, Karny (Austria). 



2'. Sides of head distinctly convergent posteriorly. The last two 



joints of the antennae dark brown. Mouth-cone laterally 



acute-angularly convergent, but apically distinctly rounded. 



2. H. baynalli, nov. spec. (England). 



Hemarks. 



Liothrips hakeri, Crawford, does not belong to Liothrips, 

 but probably either to Mesothrips or Smerintliothrips. Tlie 

 fore tarsi are armed with a large setigerous tooth as in 

 Mesothrips ; it agrees with the Javanese genns also in its 

 mode of life, living in the leaf-galls of Ficus. On the 

 other hand, the formation of the fore-femora inclines to 

 S/nerinthothrips. 



Hoodia hagnalli, nov. spec. 



Syn. Liothrips hradecensis, Bagnall, Ent. Mo. Mag., ii Ser., 

 vol. xxi, 1910, p. 256; Journ. Econ. Biol., vi, 1911, p. 

 11 (nee Uzel, 1895). 



