50 Proceedings of the Biological Society of Washington. 



very transverse, five or more times as wide as long; terminal segment 

 (the tube) greatly swollen, parabolic in dorsal aspect, nearly as wide and 

 thick as long. 



Type. — Pygothrips rugicauda sp. nov. 



Pygothrips rugicauda sp. nov. 



(Fig. 3,a-c.) 



Female {apterous). — Length about 1.3 mm. General color nearly 

 chestnut brown, with pterothorax, basal abdominal segments, tarsi, 

 distal ends of fore tibise, and antennal segments 1-3, paler. 



Head about 1.47 times as long as width across eyes; cheeks straight, 

 diverging to base, set with a few minute, inconspicuous bristles ; postocu- 

 lar bristles slightly dilated at tip, about one-third as long as head ; 

 another rather prominent pair of bristles halfway between postoculars 

 and base of head. Eyes small, about one-fourth as long as head and as 

 wide as their interval, subrectangular as seen from above, on ventral 



Fig. 3. — Pygothrips rugicauda fam. gen. et sp. nov. ; female. 

 a. Segments 7-10 of abdomen, dorsal view. 

 6. Segments 9-10 of abdomen, lateral view, 

 c. Segments 7-8 of right antenna, dorsal view. 



