LIST OF DIPTERA. 81 



Hesperinus, n. g. 



Feelers setaceous, pubescent, more than half the length of the 

 body; joints long, linear; second joint very short; third long; 

 fourth about half the length of the third ; the following joints to the 

 twelfth successively but slightly decreasing in length : legs without 

 spines : wings with five longitudinal veins ; the first, from the hind 

 border, slight, indistinct, curving downwards at the tip, and reach- 

 ing the hind border before one -third of the length of the wing; se- 

 cond stout, following the curve of the first, and terminating on the 

 hind border before half the length of the wing ; third slender, forked 

 after half its length, its branches join the hind border near its tip, 

 its upper division is slightly curved downwards ; a cross vein joins 

 the third vein with the second, somewhat after half the length of the 

 latter, and forms a slight outward angle, whence a vein proceeds to 

 the hind border of the wing : fourth vein stout, passing very near 

 the fore border, and joining it at three-fourths of the length of the 

 wing; at half its length it sends forth a branch which follows the 

 curve near the tip of the wing, where it ends ; a short perpendicular 

 vein connects this branch with the third vein before the fork of the 

 latter, and a longer and very oblique vein joins it to the fore border 

 after the tip of the fourth vein. 



Hesperinus brevifrons, Barnston MSS. Nigro-fuscus, antennis 

 pedibusque fuscis, thorace cano trivittato, abdomine cano univit- 

 tato, alis cinereis. 



Body dark brown : feelers brown : chest with three hoary stripes, 

 the middle one very broad : abdomen with a narrow hoary line in 

 the middle ; segments rather contracted at the base : legs brown, 

 pubescent; their brown colour from the thighs to the feet gradually 

 passing to pale yellow : wings gray ; veins black ; poisers pale brown 

 or dull tawny. Length of the body 3 lines ; of the wings 6 lines. 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



Bittacomorpha, Westwood. 



Bittacomorpha clavipes, Westwood, Lond. and Edin. Phil. Mag. 

 vi. 281. Macq. Hist. Nat. Dipt ii. 649, 1. Dipt. Exot. i. 64. 

 Tipula clavipes, Fabr. Spec. Ins. ii. 404, 19. Mant. Ins. ii. 

 323, 21. Ent. Syst. iv. 239, 25. Gmel. Syst. Nat. v. 2815, 

 66. Ptychoptera clavipes, Fabr. Syst. And. 22, 4. Wied. 

 Auss. Zweif. i. 59, 1. 



a. Trenton Falls. Presented by the Entomological Club. 



b. Nova Scotia. From Lieut. Redman's collection. 



c. Nora Scotia. From Mr. Children's collection. 



