of the Family Tabanidae. 369 



dark shading of the brown colour. Logs dull yellow, the 

 fore legs, all the femora, and the last four joints of the 

 tarsi browuer. Wings hyaliue with a brown stigma, veins 

 yellowish. 



Length 10 mm. 



Mr. Vcrrall has kindly presented these to the Natural 

 History Collection (British ^Museum) . 



The following table is drawn up for the six species repre- 

 sented in the British Museum Collection : — 



1. Winp-s hyaline, with two brown half-bands 



united, or one brown baud, and brown 



shading: in the anal cell 2. 



Wings yellowish, with the apex and the inner 

 border brown marginata, $ , Macq. 



2. Abdomen yellowish, with only the apex 



brown T-7iujrum, $ , F. 



Abdomen yellowish or whitish, with brown 



bands 3. 



3. Legs black, the middle and fore tibiae white, damicornis, 2 , F. 

 Legs yellowish 4. 



4. The band of the wing as two half-bands. . . . cervicornis, 2, !'• 

 The band of the wing as one. with a brown 



stripe on the third lojigitudinal vein to 



border ; tooth of antennae very small .... bifactex, 2 > Walker. 

 The band of the wing as one, but no brown 

 stripe ; tooth of antennae not small grcmdis, 2 > sp- "• 



Dichelacera cervicornis, ? , Fabr. 



One male from St. Paul's, Amazons (Bates Coll.), 59. 74* 

 (it was labelled D. brunivitta, evidently a ^[S. species of 

 Walker's). 



One female type oi fasciata,V^\\i. (Saunders Coll.), G8. 4; 

 one female type of multlfascia, Wlk., from Para (Saunders 

 Coll.), 68. 4 ; three females from the Amazons (Bates Coll.), 

 66. 53 ; one female from Brazil ; one female from David, 

 Chiriqui, Panama {C/iatnpion), Biol. Centr.-Am. Coll. 



This is a species that seems to vary in size and colouring, 

 as remarked by Osten Sacken in Biol. Centr.-Am., Dipt. i. 

 p. 58, the colour varying from pale yellow to dark brown. 

 Walker^s D. nmUifascia is nothing but a large specimen of 

 D. cervicornis, measuring 11 mm., and, as surmised by 

 Obten Sacken, his D. fusciata is a specimen of this species. 



Dichelacera damicornis, ? , Fabr. 



Two females from Para (Saunders Coll.), 68. 4; one 

 female from Villa Nova, Amazons (Bates Coll.), 55. 75 ; one 

 female from Para (Bates Coll.), 66. 53. 



This species is distinguished from D. cervicornis by the 

 yellow-brown shining tubercle on the face below the antennae, 

 and by the brown legs, with only the middle and anterior 



