the genus Systropus. 575 



alteroque scutellari, albidis. Pedes antlci flavidi, femoribus 

 IDi-ope basin obscurioribus ; pedibus intermediis flayidis, 

 femoribus nigricautibiis apice pallidis, tibiis mediis in 

 medio obscuris. Alte clariores, venis nigris. 



Sp. 5. Systropus FoUstoides, Westw. 



Niger, albido-variegatus ; alis griseo-fuscescenti tinctis, 

 puncto medio obscuro ; antennis nigris, articulo basali albo. 



Habitat Cliantibon, Siam (Mouhot). 



Head black, eyes imited on crown of bead ; face narrow, 

 widening below, albidous and silvery, the orifice for the 

 rostrum extends halfway up the narrowed front. An- 

 tenn£e black, basal joint albidous, extreme tips, black; 

 2nd joint short, black; 3rd more than two-thirds the length 

 of the 1st, flat, black, broader than the other joints. 



Thorax black, anterior lateral angles with a large albi- 

 dous spot extending irregularly down the sides and touching 

 the base of anterior coxfe ; a quadrate spot on each side of 

 the dorsum of thorax in fr'ont of each wing ; a transverse 

 line behind wings, extending across dorsum, with each end 

 pointed and directed forwards ; a very minute spot at the 

 base of each of the halteres, and a large oblong spot on 

 each side of the thorax below the wings, extending to the 

 base of the hind legs. Halteres brownish, with Avhite 

 knobs. Abdomen with their basal jomts albidous, the 

 upper part of each black, the black extending at the 

 extremity of each joint down the sides of the Joints, 4th 

 segment" black, with a basal albidous fascia, interrupted 

 Avith black in the middle of the back ; 5th, 6th and 7th 

 segments black, with the hind margin of each narrowly 

 albidous. Anterior coxas albidous, fore legs albidous, basal 

 half of femora and four terminal joints of tarsi black ; 

 middle legs similarly coloured ; hind femora and tibiffi pale 

 brown above, albidous below, tips of tibias black; tarsi 

 brown, terminal joints black ; wings smoky-grey, shghtly 

 tino-ed with yelloAvish on the costa, veins black, a spot 

 behind the middle of the costa blackish (where the veins 

 fork). 



Sp. 6. Systropus Eumenoides. (PI. X. fig. 13—15.) 



Flavus, antennarum apice thoraceque nigro-variegato, 

 abdomine apicem versus nigro-fasciato. 



Long. corp. lin. 9. . . ,. 



Habitat in partibus septentrionalibus India) orientalis. 

 In Mus. Britann., olim Saunders. 



