172 Proceedings of the Biological Society of IVashingfon. 
Plate I\'. 
I'ig. 1. Haplotlirips humilis sp. nov. Head and prothorax, I’l'inale 
(holotyj^e). 
1. Haplotlirips humilis. Segment 3 of left antenna, femalefholo- 
type). 
3. Haplothrips govideyi (Franklin). Segment 3 of left antenna, 
female (paratype). 
4. Rhynchothrips tridentatus (Shull). Segments C-S of right 
antenna. 
o. Rhynchothrips tridentatus. Head and prothorax, female. 
(). Liothrips caryx (Fitch) Hood. Head and prothorax, female 
(neoholotype). 
/. Dichxtothrips brevicollis gen. et sp. nov. Head and prothorax, 
female (holotype). 
Plate 
big. I. Diceratothrips picticonvis sp. nov. Head and prothorax, female 
(holotype). 
2. Diceratothrips picticornis. Eight fore femur, male (allotype). 
3. Potyphemothrips corticis sp. nov. Head and prothorax, male 
(allotype). 
4. Crypiothrips gilvipes sp. nov. Head and prothorax, female 
(holotype). 
