366 Miss G. Ricardo on the Tabanina3 



more properly belong to Tabanus. D. alcicornis and D. Ja- 

 nuarii may belong to the group represented by D. cervicornis, 

 though the former is described as having stripes, not bands, 

 on the thorax. Of the species described and placed by 

 Macquart in his genus, I have seen only D. marginata, which 

 resembles D. cervicornis in colouring &c. D. unifusciata, he 

 states, is related to D. alcicornis, Wiedem., and D. immacu- 

 lata to D. flava, Wiedem. ; D. binotata and D. longicornis 

 belong to the genus Acanthocei-a. D. rufa, he suggests, may 

 be a variety of D. Januarii, Wiedem., but Rondani renamed 

 it Tabanus brasiliensis. D. testacea and D. fuscipennis do 

 not seem to have the typical colouring and shape of the cervi- 

 cornis group. D. scapularis seems related, so far as the 

 markings of the wing are concerned, to D. marginata, and 

 from Bellardi's figure appears likely to belong to the genus 

 in sensu stricto, though in colouring it is black. 



Of Walker's species, D. sparsa, repanda,pr(etereuns, trans- 

 posita, vacillans, and abiens will more properly belong to 

 Tabanus. D. fasciata and multifasciata prove to be synonyms 

 of D. cervicornis, D. hinnulus of D. marginata, and D. bifacies 

 alone seems a distinct species. D. nubipennis, Rondani, has 

 hairy eyes, apparently not usual in this genus, and from the 

 description I should doubt its being correctly placed in this 

 genus. 



The following list includes the described species of Diche- 

 lacera, excluding those which appear more correctly to belong 

 to Tabanus ; one or two are inserted with a query as to which 

 genus they belong : — 



D. cervicornis, $ , Fabr., Sjst. Autl. p. 100 (I8O0) ; Wiedem., Dipt. Exot. 



i. p. 79 (1821) ; id. Auss. zweifl. Ins. i. p. 157 (1828) ; Macq., Hist. 



Nat. Dipt. i. p. 197 (1834) {Tabcmus); Walker, List Dipt. pt. v. 



Suppl. 1, p. 153 (1854) ; Schiner, Reise Novaru, Dipt. p. 94 (1866) ; 



Ost. Sack., Biol. Centr.-Amer., Dipt. i. p. 58 (I856) ; Will., ibid. 



Suppl. p. 263 (1900). [D. fasciata, $, Walker, Dipt. Saund. i. 



p. 68 (1848) ; Ost, Sack., Cat. N. Amer. Dipt. (1878) p. 55, note. 



7). multifasciata, 5 , AValker, /. c. p. 69.] — Central and S. America. 

 D. damicornis, 5, Fabr., Sjst. Antl. p. 101 (1805); Wiedem., Dipt. 



Exot. i. p. 87 (1821) ; id. Auss. zweifl. Ins. i. p. 159 (1828) ; Macq., 



Plist. Nat. Dipt. i. p. 97 (1834) {Tabanus) ; id. Dipt. Exot. i. p. 112 



(1838) ; Walker, List Dipt. pt. v. Suppl. 1, p. 151 (1854).— Brazil. 

 D. T-nigrum, $ , Fabr., Sjst. Antl. p. 101 (1805) ; Wiedem., Auss. zweifl. 



Ins. i. p. 160 (1821) \Tahnnus) ; Macq., Dipt. Exot. i. p. 112 (1838) ; 



Walker, List Dipt. pt. v. Suppl. 1, pp. 152, 325 (1854) ; Will, Kans. 



Univ. Quart, iii. p. 193 (1895), under Tabanus T-nifjrum. — S. America. 

 D. Januarii, 5 , Wiedem., Zool. Mag. iii. p. 43 (1819) ; id. Dipt. Exot. i. 



p. 94 (1828); id. Auss. zweifl. Ins. i. p. 162 (1828) {Tabanus); 



Macq., Dipt. Exot. Suppl. 3, p. 10 (1848) ; Walker, List Dipt. pt. v. 



Suppl. 1, p. 153 (1854) ; Schiner, Beise Novara, Dipt. p. 95 (1866). 



— Brazil and Rio Janeiro. 

 D. alcicornis, 5, A¥iedem., Auss. zweifl. Ins. i. p. 158 (1828) {Tabanus) ; 



