84 LIST OF DIPTERA. 



Trichocera bimaeula, n. s. Cano-fulva, thorace cano trivittato, 

 abdomine fusco fasciato, antennis tarsisque fuscis, pedibus ful- 

 vis, alis limpidis fusco bimaculatis. 



Head and chest overspread with a slight hoary bloom : head 

 tawny : palpi and eyes black : feelers brown, slender, pubescent, 

 more than half the length of the body : chest brown : three indis- 

 tinct hoary stripes on the disk of the shield : breast tawny: abdomen 

 with alternate tawny and brown rings : legs tawny, slender, pu- 

 bescent ; knees and feet brown : wings colourless, with two small 

 pale brown spots on the disk ; veins brown ; poisers tawny. Length 

 of the body 2 lines ; of the wings 5 lines. 



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



Trichocera gracilis, n. s., fern. Nigra, gracilis, pedibus fuscis, 

 alis subcinereis immaculatis. 



Body black, slender, dull : scutcheon and breast piceous : 

 feelers black, nearly half the length of the body : legs brown : wings 

 slightly gray, not spotted ; veins black ; poisers tawny, with piceous 

 knobs. Length of the body 2 lines; of the wings 5 lines. 



a. New York Factory. Presented by Dr. Rae. 



e. Fungicolae Meigen. 

 Dixa, Meigen. 



Dixa aestivalis, Meig. Dipt. i. 218, 2. Macq. Hist. Nat. Dipt. i. 



116, 1. Gim. Bull. Soc. Imp. Nat. Mosc. 1846, xix. 2, 51, 1. 

 Blanch. Hist. Nat. Ins. iii. 571. 



a. England. From Mr. Walker's collection. 



b. Prussia. From Mr. Walker's collection. 



Dixa aprilina, Meig. Dipt. i. 218, 3, t. 7, /. 12. Macq. Hist. Nat. 



Dipt.i. 116, 2, pi. 3, /. 5. 

 a. England. From Mr. Walker's collection. 



Dixa maculata, Meig. Dipt. i. 219, 4. Macq. Hist. Nat. Dipt. i. 



1 17, 3. Gim. Bull. Soc. Imp. Nat. Mosc. 1846, xix. 2, 51,2. 

 Stceger, Kroger, Nat. Tids. iii. 57, 1. 



a. England. From Mr. Walker's collection. 



Dixa nebulosa, Meig. Dipt. vi. 293,5. Zett. Ins. Lapp. 854, 1. 

 Curt. Brit. Ent. 409, 6. Guer. Icon. Regn. Anim. Ins. pi. 93, 

 /. 1. Stager, Kroger, Nat. Tids. iii. 67, 2. 

 a. England. From Mr. Walker's collection. 



