106 MB. P. WALKER ON NEW SPECIES OP DIPTEEA 



Abdomen dull luteous, pale at the base, brown at the tip. Legs very 

 lono-. Wings long, slightly cinereous ; veins luteous, with two white 

 marks, one on the veinlets near the base, the other on the veinlets in 

 front of the discal areolet ; stigma testaceous ; halteres with brownish 

 knobs. Length of the body 12 lines ; of the wings 32 lines. 



Gren. PACHTRHiifA, 3£acq. 



13. Pachyrhina tenuis. Mas. Flava, capitis vitta palpis apice an- 

 tennis thoracis disco abdomineque nigris, abdomine fasciis quatuor 

 angustis flavis fasciaque subapicali lata flavescente, pedibus fulves- 

 centibus tarsis nigris, alis subcinereis. 



Male. Pale yellow, slender. Head with a black discal stripe. Palpi 

 black towards the tips. Antennae black, except at the base. Disk of 

 the thorax black, with the exception of a short oblique yellow streak 

 on each side in front. Metathorax black. Abdomen black, with four 

 narrow pale yellow bands ; a broad yellowish subapical band. Legs 

 slender, dull pale tawny; tibiae darker than the femora; tarsi black. 

 Wings slightly cmereous ; veins black ; stigma brown ; halteres with 

 blackish knobs. Length of the body 7 lines ; of the wings 14 hnes. 



Fam. STRATIOMID^, Haliday. 

 Gren. Clitillaria, Meigen. 



14. Clitillaria responsalis. Fcem. Nigra, antennis articulo 3° 

 intus albo, thorace cinereo tomentoso vitta dorsali maculisque quatuor 

 nudis, abdomine vitta postica maculisque quatuor trigonis argenteis, 

 femoribus lividis apice nigris, tibiis tarsisque posterioribus albidis 

 apice nigris, alis cinereis, halteribus albidis. 



Female. Black. Head with silvery cinereous tomentum in front and 

 about the eyes. Antennae nearly as long as the breadth of the head ; 

 third joint white on the inner side. Thorax covered with cinereous 

 tomentum, excepting a dorsal stripe and two spots on each side. 

 Abdomen with a short hindward silvery stripe, and with two trian- 

 gular silvery spots on each side. Femora livid, except towards the 

 tips; posterior tibiae and tarsi whitish, with black tips. Wings cine- 

 reous; veins black; halteres whitish. Length of the body 5 lines; 

 of the wings 8 lines. 

 This species is closely allied to C. hivittata, from wliieli it may- 

 be distinguished by its smaller size, its broader antennae, the nar- 

 rower stripe and smaller spots of the thorax, and the wings with- 

 out any blackish tinge. 



Gren. Steatiomts, Geoffr. 



15. Stratiomys atraria. Mas et Fcem. Atra, antennis basi fulvis, 



