146 MU. WALKEE ON DIPTEEA COLLECTED IK AMBOTNA. 



middle one more distinct than the others ; scutellum lurid. Abdomen 

 red, with gilded tomentum, black at the base ; second segment dingy 

 whitish, semihyaline. Femora reddish towards the tips; tibiae and 

 tarsi testaceous ; the former with a blackish streak on each side. Wings 

 blackish, cinereous at the base ; veins black ; halteres testaceous, with 

 apple-green knobs. Length of the body 6 lines ; of the wings 10 lines. 



Geu. Saegus, Fahr. 



8. Sargus QUADRiFASCiATUS, n. s. Mtts, Fulvus, antcnnis tcstaceis, 

 articulo 3° subrotundo, arista nigra, abdomine subclavato fasciis 

 quatuor nigris, tibiis tarsisque nigricantibus, alis cinereis, stigmate 

 halteribusque nigris. 



Male. Tawny. Head cinereous beneath, mouth and antennte testa- 

 ceous ; 3i'd joint of the latter nearly round ; arista black. Abdomen 

 subclavate, about twice the length of the thorax, with four black 

 bands. Tibiae and tarsi blackish. Wings grey; veins, stigma, and 

 halteres, black. Length of the body 4 lines ; of the wings 8 lines. 



.9. Sargus mactans, Walk. See vol. iv. p. 97. 



Fam. TABANID.E, Leach. 

 Gen. Chrtsops, Meigen. 



10. Chrysops dispar, Fabr. See vol. i. p. 9. 



Pam. ASILID^, Leach. 

 Geu. Lapheia, Fahr. 



11. Laphria TRiSTis. F(£m. Cupreo-nigra, capite nigro, facie argeu- 

 tea, antennarum articulo 3° longi-fusiformi, pectore uiveo, abdomine 

 cupreo-purpureo, pcdibus cyanescente nigris crassis, alis nigricantibus 

 basi cinei'eis, halteribus piceis. 



Laphria tristis, Dol. Nat. Tijcl. Ned. hid. 1857, p. 398. 



Female. Cupreous black, with black down and bristles. Head black, 

 with silvery-white pile on each side of the face, and with cinereous hairs 

 beneath ; mystax with several long black bristles. Third joint of the 

 antennce elongate-fusiform. Pectus shining white. Abdomen cu- 

 preous purple. Legs bluish-black, thick. Wings blackish, grey at 

 the base, veins black ; halteres piceous. Like L. scapularis in struc- 

 ture. Length of body 8 lines; of the wings 15 lines. 



12. Laphria compta, n. s. Fam. Laete cj^anea, gracihs, capite 

 aurato, facie ochraceo fasciata, antennarum articulo 3" fusiformi, tho- 



