from the Philippine Islands. 231 



The costa, the first and third veins in all these species are beset 

 with bristles; only in T. Alkestis these bristles are very small on the 

 costa and the third vein. In Macquart's figure of Acanthoneura their 

 length must be exaggerated (D. E. II, 3, Tab. 30, f. 2). Themara 

 hirtipes Rond. Ann. M. C. Gen. VII, 435 likewise seems to belong 

 to the same group. 



Tryp eta Manto n. sp. §. Although the only specimen which 

 I have is very much damaged, I will attempt to describe it, on account 

 of its singular venation. 



Yellowish -ferruginous; third antennal joint somewhat brownish; 

 arista plumose; abdomen brown or black (damaged); halteres with a 

 brown knob; legs uniformly yellowish-ferruginous. Wings brown; two 

 triangular white spots on the costa, between the tips of the auxiliary 

 and first veins; a small round white spot in the first posterior cell, not 

 far from the anterior crossvein; a similar but less round spot at an 

 equal distance from that crossvein, but on the opposite side, in the first 

 basal cell; somewhat larger spots, one each side of the posterior cross- 

 vein and a round one in the third posterior cell. This design has 



Fig. 11. 



a great resemblance to that of Themara ampla Wk., J. Pr. Lin. Soc. I, 

 Tab. I, f. 5, but with this important diff'erence: in Trypeta Manto both 

 triangular white spots on the costa lie within the stigmal cell (third 

 costal cell of Loew. Monogr. etc. I, p. XXI Vj; in T. ampla one of 

 them is outside of that cell. The reason lies in the very peculiar 

 venation of T. Manto: the stigmal cell here is unusually large, owing 

 to the course of the first vein, the tip of which is more distal than in the 

 related species; beyond this tip, the costa is stouter, as it is in T. Al- 

 kestis, but for a shorter distance, and not so conspicuously; the second 

 vein is much more deeply arcuated here than in T. Alkestis, the third 

 vein, on the contrary, much less. It may be that the extraordinary 

 shape of the stigmal cell belongs to the male sex only. Length 7 — 8 mm. 

 NB, The scutellum of my specimen of T. Manto has only two 

 bristles, inserted on each side near the base, and far apart from each 

 other. I cannot perceive the scars of the apical pair of bristles. If 



