52 Proceedings, 1922 



4. Mouth cone broadly rounded. Cheeks arched 



Compsothrips Renter 



3. Wings present Lophothrips Karny 



2. Antenna! joints without processes. 



3. Tube shorter or as long as the head. A pair of long strong 

 thorns or bristles near the anterior ocellus. 

 4. Antennae 8-jointed. 



5. Tube shorter than the head. Two very long anteriorly- 

 directed bristles in front of the fore ocellus 



Ophidothrips Schmutz 



5. Tube as long as the head. A moderately-long vei^y strong 

 outwardly-directed bristle on each side beside the anterior 



ocellus of. Anactinothrips Bagnall 



4. Antennae 7-jointed cf. Polyphemothrips Schmutz 



3. Tube clearly longer than the head. No thuriis or bristles by the 

 anterior ocellus cf . Gigantothrips Zimmerman 



DOCESSISSOPHOTHRIPS 



1. Head sharply constricted towards the side more than one-quarter of 

 the whole body length. Dorsal aspect strongly arched, venti-al side 



almost bent out at right angles when seen in lateral view 



Egchocephalothrips Bagnall 



1. Ventral side of head not at all or hardly concave 



Docessissophothrips Bagnall 



MACROTHRIPINAE 



1. Fore femur without a row of teeth. 

 2. Fore hips without a horn. 



3. On each side of the fore angles of the middle breast, two finger- 

 like thorns and beside them several smaller ones 



cf. Tetracanthothrips Bagnall 



3. Fore angles of the middle breast unarmed or with a forked 

 process. 



4. Tube only about half as long as the head...cf. Trybomia Karny 

 4. Tube about as long as the head or longer. 



5. Fore angles of the middle breast in the male, with a forked 



like process Dinothrips Bagnall 



5. Fore angles of the middle breast in both sexes unarmed. 



6. Fore tibia unarmed Adiaphorothrips Bagnall 



6. Fore tibia with a sharp claw-like tooth 



Diaphorothrips Karny 



2. Fore hips with an angularly-bent heel-like or straight cone-like 

 horn Macrothrips Bagnall 



