48 Proceedings, 1922 



4. Tube about as long as the head. Claws of the fore tarsus very 

 powerful, longer than the tarsi. Pore tibia noticeably short 

 and broad, only about one and a half times as long as broad. 



, Onychothrips Karny 



4. Tube about half as long as the head. Fore tarsi about as long 

 or even longer than their claws. Fore tibia not noticeably 



short, about three times as long as broad Oncothrips Karny 



3. Antennae 7-jointed. Black, Pterothorax and first abdominal 



segment yellow. Kladothrips Froggatt 



2. Head tapering towards the posterior margin, not much longer than 

 broad. 

 3. First antennal joint much shorter than the second. 



4. Fore wings not narrowed in the middle, with eight fringes. 



cf. Plectrothrips Hood 



4. Pore wings narrowed in the middle, sole-like, without fringes. 



ef. Podothrips Hood 



3. First antennal joint as long or longer than the second and much 

 stronger Ag^ostochthona Kirkaldy 



CRYPTOTHRIPINAE 



1. Pore femur, at least in the male, armed with a strong tooth. 



2. Tooth of the fore femur present in both sexes. Pore tibia unarmed. 

 3. Antennae twice as long as the head. Prothorax along the pos- 

 terior margin only one-third broader than the head. 



* Microcanthothrips Bagnall 



3. Antennae rarely more than one and a half times as long as the 

 head. Posterior margin of prothorax one and a half times, 



usually twice as broad as the head Androthrips Karny 



2. Tooth of the fore femur only present in the male. Pore tibia in the 



male on the inner side with three little teeth 



Aleurodothrips Franklin 



1. Fore femur in both sexes unarmed. 



2. Pore tibia armed with one tooth cf. Agnostochthona Kirkaldy 



2. Pore tibia unarmed. 



3. Head not at all or scarcely longer than broad, but longer than 



the prothorax Gastrothrips Hood 



3. Head much longer than broad. 

 4. Antennae, 8-jointed. 



5. A well developed bristle on each side of the anterior ocellus. 



Diceratothrips Bagnall 



5. No very large bristles beside the fore ocellus. 



6. An unusually long, strong bristle on each side behind the 

 hind ocellus Dichaetothrips Hood 



