536 SOME NEW AND LITTLE-KNOWN EXOTIC THYSANOPTERA 



Mentawei, and Is. Engano. It was described from a single 

 dried and carded female taken by Dr. A. R. Wallace in New 

 Guinea. An examination of well-preserved specimens shows 

 a peculiar series of blunt sense-organs arranged round the 

 apex of the third antennal joint (pi. xiv., fig. 22) which are 

 described by Bufifa. The genus is a strongly characterized 

 one, and contains two Malayan species, sanguineus (Bagnall) 

 and inermis (Buffa). 



There are numerous specimens of sangtdnetis, including 

 both sexes, in the collection from the Isle of Nias. 



Genus MACROTHRIPS Bagnall, 1908 

 Macrothrips papuensis Bagnall. 



Leyden Museum. — Two males from Sekroe, New Guinea, 

 May, 1897 (Schadler). 



Buffa records the species from Ramoi, i ^, and from 

 Ternate, 3 ?s (O. Beccari, 1875) describing the female sex, 

 which was previously unknown. 



Genus DINOTHRIPS Bagnall, 1908 



Dinothrips sumatrensis Bagnall. 



This is apparently a common and widely distributed 

 Malayan insect, and is recorded by Buffa from several 

 localities. In the Jordan collection from the Isle of Nias 

 both sexes are very numerously represented. 



Leyden Museum. — G. Salak, Buitenzorg, Sumatra, 2 males 

 in November (E. Jacobson) ; Sekroe, New Guinea, i female, 

 August, 1898 (Schadler); and Java, i female (J. B. Pasteur). 



Paris Museum. — Benghalis, Sumatra, 3 males, 1885 

 (Maindron) ; Tuyen-Quan, Central Tonkin, 2 males and 3 

 females, 1901 (A.Weiss); Sebroang, i male, November, 1890. 



Genus ADIAPHOROTHRIPS nov.* 



We propose this genus for the reception of a species which 

 falls naturally into a group of Malayan genera, Alacrothrips 



* Greek adiaphoros, " with no differentia," 



