Mr. F. Walker's Descriptions of Diptera. cxxi 



Hab. — Ega, Upper Amazons, whence several specimens have been sent home by 

 Mr. Bates, now engaged in forming entomological collections in that rich country. 

 To the untiring energy of this able naturalist we are indebted for vast and almost in- 

 calculable additions to our knowledge of the insect Fauna of the South American 

 Continent. Mr. Bates is continually transmitting the proceeds of his labours to Mr. 

 S. Stevens, of 24, Bloomsbury Street ; and as the prosecution of his researches must 

 very much depend on the success of Mr. Stevens in disposing of these collections, I 

 venture to express a sincere hope that those entomologists who possess the power of 

 doing so, will lend their pecuniary assistance to Mr. Bates, by becoming purchasers 

 of his captures, and thus furnish him with the means of continuing and extending 

 his invaluable researches. I must not allow this appeal to go forth, without distinctly 

 stating that it is perfectly spontaneous on my part, and altogether unsolicited either 

 by Mr. Stevens or Mr. Bates ; but that it is not otherwise than a necessary one, may 

 be seen by a reference to Mr. Bates' own observations at p. 2966 of the present num- 

 ber. I should also add, that when I mention an insect as in the collection of Mr. 

 Stevens, I wish it to be understood as intimating merely that it is consigned to that 

 gentleman's care, and is to be obtained on application. 



Edwaed Newman. 



Art. XV. — Characters of Undescribed Diptera in the British Museum. 

 By Francis Walker, Esq., F.L.S. 



Tabanus consequa, Fem. 



Fulvis, capite alio, thoracis disco fusco pectore cano, abdomine vittis duabus fulvo- 

 piceis ornato, antennis rufis, pedibus fulvis, tarsis pedibusque anticis nigns, 

 tibiis anticis basi albis, alls subcinereis, basi et ad costam subfulvis. 



Body tawny : head white and clothed with white hairs beneath ; a club-shaped, 

 pitchy, shining mark between the eyes, which are bronzed and parted by a moderately 

 broad interval : sucker black ; lancets ferruginous ; palpi pale yellow, clothed with 

 very short black hairs : feelers pale red ; first and second joints beset with black 

 hairs ; third slightly convex beneath, forming above a very shallow and obtuse angle, 

 which is clothed with a few very short black hairs ; compound joint very slightly 

 curved upward, much shorter than the third joint : chest pale brown, clothed with 

 short golden hairs ; sides tawny, beset with a few black bristles ; breast hoary, clothed 

 with white hairs : abdomen pale tawny, much longer than the chest, hardly decreas- 

 ing in breadth from the base to the tip, which is rounded, adorned with two stripes, 

 which are dark tawny on the fore part and pitchy towards the tip, the whole of which 

 is occupied by their union : legs tawny, clothed with pale tawny and very short black 

 hairs, the latter form a fringe on the shanks and are most numerous at the tips, but 

 abound still more on the feet ; feet black, pitchy at the base ; foot-cushions dark 

 tawny ; fore-legs black ; shanks white towards the base : wings pale gray, with a 

 slight tawny tinge towards the base and along the fore border as far as the brand, 

 which is pale brown ; wing-ribs tawny ; veins black, tawny towards the base ; tip 

 VIII. APPENDIX. H K 



