TIIKIMOVA. 301 



237. Thereva cylindrica, Wall-. 



Thereva cylindrica, A\'alker, List Dipt. Brit.Mus. i, p. 224 (1848). 



d" . " Body long and narrow; liead white, hoary beliind, with 

 a few black bristles along the hind borders of the eyes, clothed 

 heneatli witli white hairs ; eyes green and red ; feelers black : 1st 

 joint clothed witli black hairs ; 2nd joint and base of the 3rd 

 tawny ; nioutli piceous ; chest hoary, clothed "with hoary down, and 

 with a few black bristles on each side, where there is a white 

 stripe, and it has also a broad yellowish-browu stripe in the 

 middle; breast white and clothed with white hairs; abdomen 

 brown, covered with silvery glance, yellowish brown towards the 

 tip, where it is clothed with dark ta\\ny hah-s ; hind borders of 

 th3 segments pale tawny and adorned with fringes of white hairs ; 

 legs grey ; hips white ; wings slightly grey, tawny along the fore 

 border ; brands browni and narrow; veins piceous, slightly bordered 

 with dai'k tawny ; poisers piceons, with dark tawny knobs. 



" Length of the bodv 5 lines, of the wings S lines. East Indies." 

 {Walker.) 



Though described from the " East Indies,'' the typt* in tlie 

 British Museum bears the simple label " Ind.", which is considered 

 to signify India proper. 



238. Thereva iiidica. Wall: 



Thereva indica, ^^'alker, lus. Saund., Dipt. pt. •>, p. 1.39 (18.52). 



5. "Body black; head shining above, tinged with grey and 

 clothed with hoary hairs beneath ; sucker and feelers black ; "breast 

 tinged with grey; abdomen spindle-shaped, very much longer 

 than the chest; hind borders of the segments and underside 

 tinged with grey ; legs tawny, beset with a few black bristles ; 

 claws black ; wings grey ; brands bro\vn ; wing-ribs pitchy ; veins 

 black, pitchy at the base ; poisers pitch}'. 



" Length of the body 5 lines ; of the wings lines. East 

 India." {Walker.) 



239. Thereva persequa, Walk. 



Thereva jyersequa, Walker, Ins. Saund., Dipt. pt. ?>, p. I08 (18-52). 



$ . " Body black, head very shining above, silvery white in 

 front and beneath, where it is clothed with Avhite hairs ; sucker 

 black; palpi tingeil with grey, thickly clothed with white liairs ; 

 chest grey, dull, adorned on each side with a ])air of hoary stripes, 

 ti pitchy tinge between each pair; sides and scutcheon armed with 

 black bristles ; breast hoary, clotiied with white hairs ; abdomen 

 black, shining, clothed with veiw short black liairs, slightly 

 decreasing in breadth from the base to the tip, near twice the 

 length of the cliest; hind borders of the 1st and 2nd segments 

 fringed with short white hairs ; tip armed with a circlet of black 

 spines ; legs ferruginous ; hips black, tinged with hoary, clothed 

 with white hairs ; shanks beset with black bristles ; feet black, 

 pitcliy at the base; foot-cushions pitchy; wings grey, slightly 



