THYSANOPTERA FROM JUAN FERNANDEZ AND EASTER ISLAND 



275 



\1 



Ml/ 



' \IJ 



cz. 



Legs brown, middle and 

 posterior femora at the base, 

 including the trochanters, ti- 

 biae at the top and tarsi 

 yellow. 



Abdomen twice as wide 

 as the head, almost cylindri- 

 cal, but widening backwards 

 to segment IV and tapering 

 from segment VIII. Bristles 

 small, except those of the 3 

 posterior segments. Segment 

 VIII has laterally behind the 

 stigmata 3 spines: i short 

 one, standing before the 2 

 other ones; these are longer 

 and slightly curved inwards; 

 the posterior margin is pro- 

 vided with small and in- 

 conspicuous chitinous dents. 

 Segment IX has above and 

 along the posterior edge 6 

 stout and prominent spines 

 and ventraliy i weaker and 

 shorter one. Segment X, 

 split open above, has on 

 each side 3 spines, the dor- 

 sal one of which is the 

 longest and stands more in y 

 front than the other ones, 

 the ventral one is weak and Fig. 2. Physothrips Skottsbergi n. sp.: a dorsal 

 short and stands quite at head and prothorax (i^")^^ a„ten„a («|«); c;^ lateral 



first and second antennal joints ('y"). 

 the end. 



Anterior edge of the segments II — VII and tip of abdomen darker, 



Male: unknown. 



2 females, found on Masatierra 8th Dec. 19 16. 



Ph. Skottsbergi has some resemblance to PJi. basicornis E. Rent, 

 cellia, Avellino, VIII, 1909, p. 35). I do not dare, however, to decide 

 depends on real relationship or not, as I have not seen any specimens 

 basicornis. 



view of 

 view of 



(Mar- 

 if this 

 of Ph. 



Thrips tabaci Lindem. 



Of this species, very common in the greater part of North America, there 

 are from Masatierra numerous specimens, all females, three of which are found 

 in the spathe of Za?itedeschia. 



