AUSTRO-M ALA.YAN DIPTERA 417 



belong in the genus Ptecticus Loew. S. remeans also has some 

 of the characters of that genus (structure of 2* antennal joint 

 etc.), but the structure of the (/ genitals is different, as well 

 as the general coloring , which is brown , while yellow is the 

 prevailing color among the species of Ptecticus. 



Sargus mactans Wk. J. Pr. Lin. Soc IV, 97 (Celebes). 



Three specim. ; Kandari, Celebes, Apr. 1874 (Beccavi); one 

 from Ternate (id.). There may be several conflicting species 

 here, or else they vary in the extent of the black on the legs 

 and in the color of the stigma. S. mactans has yellow legs, but 

 the hind tibiae black at base. S. formicaeformis DoL, 2^^ Bijdr. 

 26 (Amboina) may be this species, but the description is too 

 vague. 



Wlicrachrysa annulipes Thorns. Eugen. Resa, 461 (Manilla). 

 One 9, Ternate, 1875 (Beccavi). 



The wings of the specimen are soiled, and thus I could not 

 identify that part of M.'^ Thomson's description. 



SVIicrochrysa flaviventris Wied. (Savgus) Auss. Zw. II, 40 



(Java). 

 One c/'; Java, 1874 (Beccavi). 



Microchrysa sp. — Mt. Singalang, Sumatra, July 1878 (Bec- 

 cavi); one 9 . 



TABANIDAE. 



Tabanus succurvus Walk. J. Proc. Lin. Soc. IV, 102! (Ma- 

 kassar, Celebes, Wk.). 



Three 9; Kandari, Celebes, April 1874 (Beccavi). 

 M. Walker's description is recognizable. 



Tabanus insurgens Wk. J. Pr. Lin. Soc. V, 276! (Batchian, 

 Wk.). 



Ann- del Mus. Civ. di St. Nat. Vol. XVI. (5 Febbraio 1881). 87 



