LIST OF DIPTERA. 737 



Tachina Mesula, n. s. Cana, capite antico fulvo, abdominis macu- 

 lis duahus fulvis, segmentorum marginibus posticis nigris, palpis 

 fulvis, antennis pedibusque nigris, tibiis fulvis, alis limpidis ad 

 costam & 



Body black, mostly covered with hoary bloom : head tawny in 

 front, clothed behind and beneath with black hairs, beset with a few 

 black bristles, but having none along the sides of the face ; epistoma 

 slightly prominent: eyes dark red, not hairy: sucker pitchy, clothed 

 at the tip with short pale hairs ; palpi very slender, tawny, beset 

 with black bristles : feelers black, as long as the face ; third joint 

 about thrice the length of the second, a little increasing in depth 

 from the base to the tip, which is truncated ; bristle black, stout till 

 near the tip, much longer than the third feeler-joint, its second joint 

 long, full twice the length of the first : chest and breast gray, 

 clothed with black hairs and bristles: abdomen obconical, hoary, 

 clothed with black hairs, armed with black spines, much longer than 

 the chest ; hind borders of the segments black ; a large tawny spot 

 on each side of the second segment : legs black, clothed with black 

 hairs and bristles ; shanks tawny : foot-cushions tawny : wings co- 

 lourless, each with a spine on the fore border : wing-ribs tawny ; 

 veins black, yellow at the base ; tip cross-vein forming a very obtuse 

 angle with the fourth longitudinal vein, straight till near the tip, 

 where it has a slight inward curve, joining the border at some dis- 

 tance above the tip of the wing ; lower cross-vein nearly straight, 

 but having a very slight inward curve a little below the middle ; 

 scales dingy white, with yellow borders ; poisers tawny. Length of 

 the body 4 lines ; of the wings 7 lines 

 a. England. 



Group III. Bonellia, Desv. Essai Myod. 56. 



Tachina picea, Megerle, Meig. Dipt. iv. 246, 12. Bonellia tessel- 

 lans ? Desv. Essai Myod. 56, 1. T. lateralis, mas. ? Desv. 

 Essai Myod. 57, 2. Micropalpus tessellans? Macq. Hist. Nat. 

 Dipt. ii. *82, 6. Meig. Dipt. vii. 219, 13. 



a. England. 



Tachina rubiginosa. Bonellia rubiginosa, Desv. Essai Myod. 57, 

 3. Micropalpus rubiginosus, Macq. Dipt. Nord. 182, 6. Hist. 

 Nat. Dipt. ii. 83, 7. Meig. Dipt. vii. 219, 12. 



a. England. 



Note.— -The definitions as groups of all the following described 



species of Tachina are comprised in the specific characters. 

 PART IV. 3 T 



