294 ENTOMOLOGICAL NEWS. [Nov. , '04 



This species is not uncommon at Berkeley and in Southern 

 California, being found on Orange and other trees infected 

 with the black scale (Saissctia olecc}. It is found very com- 

 monly beneath the old scale, among the eggs, probably feeding 

 on them. 



Female with ovipositor down curved (Thripidae). 



Antennae with seven segments . Thrips. 



Antennae with eight segments. 



Body with markedly reticulate surface .... . . Heliothrips. 



Body not reticulate. 

 Abdomen clothed with fine hairs and having a silky lustre. 



Sericothrips. 

 Abdomen without such clothing Euthrips. 



Thrips tabaci Lindeman. 



Food-plants : onion, cabbage and chrysanthemum. 

 Hab. San Francisco and Berkeley. 



HELIOTHRIPS. 



Antennae abont twice as long as head . . haemorrlioidalis. 



Food-plants : cherry-laurel and laurestina. 

 Hab. Berkeley. 



Antennae two and one-half times as long as head iasciatus. 



Food-plants : Orange leaf infested with Aspidiolns anrantii. 

 Hab. Yuba County. 



EUTHRIPS. 



Seventh antennal segment about as long as eighth pyri. 



Seventh antennal segment about twice as long as eighth. 



Fifth antennal segment about five-sixths as long as fourth occidentalis. 



Food-plants : orange, milkweed and various weeds. 

 Hab. Berkeley, Pomona and Lake County. 



Fifth antennal segment two-thirds as long as fourth tritici. 



Food-plants : rose, both cultivated and wild, bean, tomato, 

 apple and myrtle. 



Hab. Berkeley, Watsonville, San Francisco and Lake Co. 



Euthrips pyri nov. sp. 



female. Length 1.26 mm. ; width of mesothorax .32 mm. ; general 

 color dark brown. Head about as long as broad ; cheeks convexed ; an- 

 terior margin broad, acutely angular ; back of head transversely wrinkled, 



