COLLECTED AT DORET, NEW GUINEA. 239 



Gren. Ebistalis, Latr, 



38. Eristalis splendens, Leguill. See vol. iii. p. 95. 



39. Eristalis bomboides. Walk. See vol. iv. p. 119. Fceml Atra, 

 capite nigro-cyanescente, thorace fascia senea fasciaque anteiiore cine- 

 rea, scutelli margiue postico ffineo, abdomine ajneo fasciis duabus 

 conuexis atris, tibiis basi pallide flavis, alls ciiiereis dimidio costali 

 nigricante. 



Female. Deep black ; head bluish black, shining, with white tomentuni 

 behind and on each side in front ; antennaj black ; thorax with a 

 cinereous baud in front, and with a middle aeneous baud ; hind border 

 of the scutellum also aeneous ; abdomen aeneous, with two deep-black 

 bands which are connected in the middle ; legs shining ; tibiae pale 

 yellow towards the base ; wings cinereous, blackish for half the breadth 

 from the costa ; veins black ; halteres pale yellow. Length of the 

 body 5 lines ; of the wings 9 lines. 



40. Eristalis oBscuRATA, n. s. Mas et Fcem. Atra, capite albido, 

 thorace fascia media chalybea abbreviata fasciaque anteriore aeneo- 

 albida, scutelli margine chalybeo, abdomine maculis tribus transversis 

 apiceque chalybeis, tibiis halteribusque testaceis, alis cinereis costae 

 dimidio basali lurido. 



Male and Female. Deep black ; head covered with whitish tomentum, 

 excepting the vertex and the callus in front ; antennae black ; arista 

 bare ; thorax with a coppery whitish band in front, and with a much 

 abbreviated chalybeous band in the middle ; hind border of the scu- 

 tellum chalybeous ; abdomen whitish at the base, with three trans- 

 verse chalybeous spots and a chalybeous tip ; tibiae chngy testaceous, 

 piceous towards the tips ; wings cinereous, lurid brown along half the 

 length in front ; veins black ; halteres testaceous. Length of the 

 body 4 lines ; of the wings 8 lines. 



Gen. Baccha, Fahr. 



41. Baccha basalis, n. s. Mas. Chalybeo-nigra, thorace maculis 

 duabus lateralibus flavis, abdomine fulvo contracto fasciis duabus piceis 

 apicem versus nigro fusiformi, pedibus pallide fulvis, tibiis ]50sticis 

 fascia subapicali picea, alis cinereis vitta difl^'usa nigricante, halteribus 

 pallidis. 



Male. Chalybeous black ; head with whitish tomentum beneath and 

 about the eyes ; thorax on each side with a yellow spot, which is pro- 

 longed into a band on each side of the pectus ; the latter with a livid 

 sjjot on each side by the alulae ; abdomen tawny and much contracted 

 for nearly two thirds of its length from the base, black and fusiform 

 from thence to the tip, with two piceous bands in the middle ; legs 

 pale tawny ; hind tibiae with a piceous subapical band ; w ings cine- 

 reous, with a middle faint diffuse blackish band, which is obsolete 

 hindward ; veins black, tawny at the base ; halteres pale. Length of 

 the body 5j lines ; of the wings 9 lines. 



