284 MR. wa.lker's catalooue of dipterous insects 



dull tawny. Wings black, cinereous along the hind border ; fore 

 branch of the prtebrachial vein much bent ; discal transverse vein 

 much curved; halteres black. Length of the body 2^ lines; of the 

 wings 5 lines. 



Fam. SYEPHID^, LeacJi. 



Gren. Eristalis, Lair. 



55. Eristalis helophiloides, n. s. Mas. Nigra, antennaruni 

 arista nuda, thorace luteo uigro-trivittato, vitta media interlineata, 

 abdomine fascia basali albido-flava, maculis utrinque tribus latcralibus 

 magnis connexis flavis, femoribus posticis valde incrassatis, tibiis 

 rufescentibus, alis cinereis basi fasciaque abbreviata nigricantibus, 

 halteribus pallide flavis. 



Male. Black. Head with cinereous tomentum, except a black shining 

 stripe on the very prominent epistoma. Arista simple. Thorax luteous, 

 with three black stripes, the middle one interlined, the lateral pair ob- 

 liquely intersected. Pectus cinereous. Abdomen with a whitish-yel- 

 low basal band, and on each side with three large connected yellow 

 spots; the 3rd pair connected hiudward in the disk. Hind femora 

 much incrassated ; tibiaj reddish. Wings cinereous, blackish at the 

 base, and with a blackish middle band which is much abbreviated hind- 

 ward ; veins black ; halteres pale yellow. Length of the body 5 lines ; 

 of the wings 9 lines. 



56. Eristalis splendens, Lc^. See Vol. UL p. 95. 



57. Eristalis lucilioides, n. s. Fa>m. Lxte purpurea, cyaueo- 

 varia, capite albo, anteniiis piccis, arista nuda, thorace subcano, ab- 

 domine fasciis duabus atris, tibiis tarsisque nigvis, alis cinereis, hal- 

 teribus albis. 



Female. Bright purple, varied with blue. Head with white tomentum 

 behind and in front, excepting a stripe and the sides of the peristoma, 

 which are black and shining. Antennae piceous ; arista simple. Tho- 

 rax slightly covered with hoary down ; scutellum with black hairs. 

 Abdomen Avith two deep-black bands. Tibiae and tarsi black. V\'ings 

 cinereous, darker towards the tips; veins black; halteres white. 

 Length of the body 43 lines; of the wings 9 lines. 



Gen, EtJMERUs, Meigen. 



58. EuMERUs ARGENTiPES, u. s. Fwm. Chalvbeo-niger, cinereo pu- 

 bescens, abdomine fasciis duabus aibis arcuatis interrujjtis, femoribus 

 posticis subincrassatis, tibiis anterioribus fulvis, tarsis argcnteis, alis 

 cinereis apice nigris, halteribus albis. 



Female. Clialybeous black, with cinereous down. Head wanting. Ab- 

 domen with two arched interrupted white bands. Legs black ; hind 

 femora slightly incrassated ; knees and anterior tibiae tawny ; tarsi 



