58 DIPTEEA. 



DICHELACERA. 



Dichelacera, Macquart, Dipt. Exot. i. 1, p. 112 (1838). 



1. Dichelacera cervicornis. 



Dichelacera cervicornis (Fabr.), Wiedem. Aussereur. zweifl. Ins. i. p. 157. 



Hob. Central Ameeica; Panama, David in Chiriqui (Champion). — South Ameeica. 



A single small specimen has been received from the State of Panama. 



This species varies very much in size and in the intensity of the colouring. I have 

 compared the types in Vienna. 



In the British Museum the same species figures as Dichelacera fasciata, Walk. (Ins. 

 Saund. p. 68). I am afraid that a substitution of specimens has taken place here, 

 because of the total disagreement with the description — the more so as the specimen is 

 labelled South America, and the description gives North America. 



List of the Tabanidse from Mexico and Central America hitherto described, besides the 

 above-mentioned species (where no locality is given, Mexico is understood). 



Pangonia auridans, Wiedem. Aussereur. zweifl. Ins. ii. p. 620. 



atrifera, Walker, Trans. Ent. Soc. n. ser. v. p. 272. 



flavo-hirta, Bellardi, Saggio &c. i. p. 49. 



fuhithoraw, Wiedem. Aussereur. zweifl. Ins. i. p. 89 ; Bigot, in R. de la 



Sagra&c. p. 797. — Also in Brazil and Cuba. 



incerta, Bellardi, 1. c. i. p. 52. — Orizaba, Mexico. 



nigronotata, Macq. Dipt. Ex. Suppl. iv. p. 27, t. 2. f. 5 ; Bellardi, 1. c. i. p. 51. 



— Orizaba, Mexico. 



planiventris, Macq. Dipt. Ex. Suppl. iv. p. 26. 



rhinophora, Bellardi, 1. c. i. p. 46, t. 2. f. 1. 



rostrifera, Bellardi, 1. c. i. p. 47. 



sallei, Bellardi, 1. c. i. p. 50. 



saussurei, Bellardi, 1. c. i. p. 49, t. 2. f. 4. — Orizaba, Mexico. 



semifiava, Wiedem. 1. c. ii. p. 622 ; Bellardi, 1. c. i. p. 51, t. 2. f. 2 (syn. 



P. bicolor, Macq. Dipt. Ex. Suppl. iv. p. 27 [Bell.]). — Orizaba, Mexico. 



tenuirostris, Walker, Trans. Ent. Soc. n. ser. v. p. 272. 



Wiedemann^ Bellardi, 1. c. i. p. 48, t. 2. f. 3 (syn. P. basilaris, Wiedem. 



Aussereur. zweifl. Ins. ii. p. 621 [Bell.]). 

 Chrysops jlavidus, Wiedem. Aussereur. zweifl. Ins. i. p. 199 ; O. Sack. Prodr. 



i. p. 385 (syn. C.pallidus, Bellardi, 1. c. i. p. 73, t. 2. f. 16). 

 affinis, Bellardi, 1. c. i. p. 70, t. 2. f. 14. 



