174 The Philippine Journal of Science 1923 



straightened out, it is useless to give a new name to Platy- 

 brachys Dammerman. 

 Sogata furcifera (Horvath) . 



Sumatra, Fort de Kock, 920 meters elevation, January, 1921 

 (Jacobson), 5 specimens. 



This species has nearly a world-wide distribution. I have not 

 yet placed it in any genus with any satisfaction but believe it 

 is best placed in Sogata. 

 Nilaparvata greeni Distant. 



Sumatra, Fort de Kock, 920 meters elevation, January, 1921 

 (Jacobson), 3 males and 2 females. 



The type of this genus, N. greeni Distant, is the same as 

 Dicranotropis anderida Kirkaldy, and the same as what Melichar 

 identifies as Delphax sordescens Motschulsky. I am deeply 

 indebted to Doctor Bergroth for critical remarks and copies 

 of the original descriptions of some of Motschulsky's species 

 of Delphax. He suggests that possibly Melichar's identification 

 of D. sordescens may not be correct. In this I quite agree 

 with him and shall consider greeni as the type until the type 

 of D. sordescens has been reexamined. 



This species has a wide distribution from Australia to India, 

 China, and Formosa. The distinctive feature of the genus is 

 two or three small spines on the hind basal tarsal segment. 

 Delphacodes striatella (Fall). 



Sumatra, Fort de Kock, February, 1921 (Jacobson), 1 male. 



It is interesting to find this European species in Sumatra. 



DERBIDiE 

 Herpis borneensis Muir. Plate 1, fig. 4. 



Sumatra, Medan, October 20, 1920 (Corporaal), 1 male: 

 Fort de Kock, November, 1920 (Jacobson) , 1 female. 



The genital styles are slightly more angular than in the type 

 specimen. The sedeagus has not been dissected out. 

 Vekunta punctula (Melichar). 



Sumatra, Medan, January 31, 1921 (Corporaal), 1 female. 



This specimen agrees with the description, but as no mention 

 is made of the genitalia or even the sex, of the type, the identifi- 

 cation remains uncertain. 



Pregenital plate large, short at sides, the outer thirds of the 

 hind margin nearly straight, the middle third produced into a 



