LIST OF DIPTERA. 741 



Tachina Orasus, n. s. Cinerea, capitis lateribus ferrugiueo macula- 

 tis, thoracis vittis tribus nigris, scutello ferrugineo, abdomine 

 cano nigroque tessellato, palpis piceis, antennis ferrugineis, arti- 

 culo 3° pedibusque nigris, alis cinereis, venis fusco marginatis. 

 Body black, clothed with black hairs and bristles : head covered 

 with dull tawny bloom, clothed behind and beneath with black 

 hairs, pitchy and furrowed between the eyelets and the base of the 

 feelers, adorned with a large ferruginous spot on each side of the 

 face ; epistoma not prominent, no bristles on the sides of the face : 

 eyes pitchy, hairy : sucker black, slender, long, clothed at the tip 

 with a few tawny hairs ; palpi pale pitch-colour, long, slender, beset 

 with black bristles : feelers hardly three-fourths of the length of the 

 face; first and second joints dark ferruginous; third joint black, 

 slightly concave above, equally convex beneath, rounded at the tip, 

 about thrice the length of the second joint; bristle black ; second 

 joint rather more than twice the length of the first ; third joint much 

 longer than the third feeler-joint, stout, though tapering for full one- 

 third of its length, slender from thence to the tip : chest covered 

 with a dark gray bloom, which is interrupted by three indistinct 

 black stripes, hoary on each side; scutcheon ferruginous, armed with 

 some long black spines : abdomen nearly oval, not longer than the 

 chest, tessellated, or adorned with hoary reflections, which are inter- 

 rupted by four rows of black intervals, the latter are most con- 

 spicuous on each side : legs black, slender, rather long, clothed with 

 black hairs and bristles: foot-cushions small, pale tawny: wings 

 gray, brown along the borders of the veins ; wing-ribs dark tawny ; 

 veins black, tawny as the base ; tip cross-vein forming an angle with 

 the fourth longitudinal vein, which projects a little beyond, curved 

 inward. near the base, slightly waving from thence to the tip, joining 

 the border a little above the tip of the wing ; lower cross-vein with 

 two large and distinct curves, one inward and near the base, the 

 other outward and towards the tip ; scales tawny, with- dark bor- 

 ders. Length of the body 4 lines ; of the wings 8 lines. 

 a. New Zealand. Presented by Dr. Sinclair. 



Group IV. Marshamia, Desv. Essai Myod. 57. 



Tachina Mestor, n. s. Nigra, capite thoracis lateribus scutelloque 

 ferrugineis, abdomine fulvo basi nigro, antennis ferrugineis, pe- 

 dibus fulvis, tarsis nigris, alis subcinereis. 



Head ferruginous, brighter in the face, along whose sides there 

 are no bristles ; a pitchy stripe between the eyelets and the base of 

 the feelers ; underside clothed with white hairs ; epistoma not pro- 



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