9G WALKER ON DIPTEEA OF AEU ISLANDS. 



Female. Tawny. Head with testaceous tomentum, vertex black, shining; 

 antennae testaceous, arista simple ; thorax with five testaceous stripes ; 

 pectus with two oblique testaceous bands on each side; abdomen 

 black, with six somewhat luteous spots, the basal pair larger and 

 darker than the middle pair, which are larger than the hind pair, 

 apical segment with two testaceous points, hind borders of the seg- 

 ments aeneous above, testaceous beneath ; legs lilack, tibia? at the 

 base and tarsi testaceous ; wings nearly limpid, costa with two black 

 points; halteres testaceous. Length of the body 5^ lines; of the 

 wings 10 lines. 



73. Eristalis MUSCoiDES, n. s. Mas. Cyaneo-viridis subchaly- 

 beus, capitis callo antennisque fulvis, faciei lateribus albo tomentosis, 

 thorace subvittato, abdomine nigro maculis seneo-viridibus, pedibus 

 nigris, alis subcinereis, halteribus albis. 



Male. Bluish-green, with a slight chalybeous tinge. Face with white 

 tomentum along each side, middle callus tawny, shining; antennae 

 pale tawny, arista plumose ; thorax with three indistinct black stripes, 

 the lateral pair oblique, callus on each side beneath pale tawny; 

 abdomen black, second segment with a broad interrupted bluish 

 green band, third segment with four aeneous-green streaks, fourth 

 segment also with four streaks which are united on the hind border, 

 ventral segments whitish on each side; legs black; femora bluish 

 black towards the base ; wings slightly cinereous ; halteres white. 

 Length of the body 4 lines ; of the wings 8 hnes. 



Gen. Helophilus, Meigen. 



74. Helophilus quadrivittatus, Wied. Auss. Zweifl. 11. 168. 22. (Eris- 

 talis). 



Inhabits also Hindostan. 



75. Helophilus mesoleucus, n. s. FcBm. Niger, faciei lateribus 

 niveo tomentosis, thorace vittis quatuor canis, scutello, abdominis 

 fascia antica latissima interrupta basique lutescentibus, aUs cinereis, 

 venis basi halteribusque fulvis. 



Female. Black. Face with snow'-white tomentum on each side ; thorax 

 with four hoaiy stripes ; pectus with a cinereous disk ; scutellum pale 

 luteous ; abdomen pale luteous at the base, and with a broad inter- 

 rupted pale luteous band on the second segment, third and fourth 

 segments somewhat chalybeous, the former livid along the fore 

 border, under side with two lateral abbreviated pale luteous stripes ; 

 hind femora thick ; wings grey, veins towards the base, and halteres, 

 tawny. Length of the body 62- lines ; of the wings 12 lines. 



Gen. Xtlota, Meigen. 



76. Xylota ventralis, n. s. Fosm. Nigro-chalybea, capite albido 

 tomentoso, scutello fulvo, vittis duabus ventralibus latis abbreviatis 



