366 Miss G. Ricardo on the TabaniiiJB 



more properly belong to Tabanus. D. alcicorn'is and D. Ja- 

 nuari'i may belong; to the group represented by jt>. cervicornis, 

 tbough tbe 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,\\\\\c\\ 

 resembles D. cervicor/iis in colouring &c. D. un'ifusciafa, he 

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

 Ifita to D. flava, "Wiedem. ; D. b'lnotata and D. hnyicornis 

 belong to the genus Acanthocera. D. i^ufa, 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 coloiiring and shape of the cervi- 

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

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

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

 in sensu sfricto, though in colouring it is black. 



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

 posita, vacillans, and abiens will more properly belong to 

 Tabanus. D. fasciata and rnultifasciata prove to be synonyms 

 of D. cervicornis, D. himmhis 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., Svst. Antl. p. 100 (1805) ; Wiedem., Dipt. Exot. 



i. p. 79 (1821} ; id. Auss. zweifl. Ins. i. p. \'u (182.S) ; Macq., Hist. 



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



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



Ost. Sack., Biol. Centr.-Amer., Dipt. i. p. 58 (18s6) ; Will., ibid. 



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



p. 68 (1848) ; Ost. Sack., Cat. N'. Amer. Dipt. (1878) p. 5o, note. 



T). multifascidtn, $ , Walker, /. c. p. 69.] — Central and S. America. 

 D. damicornis, $, Fabr., Syst. Antl. p. 101 (1805); Wiedem., Dipt. 



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



Hist. 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-ni(/rum, $ , Fabr., Sy.«t. Antl. p. 101 (1805) ; Wiedem., Auss. zweifl. 



In.s. i. p. 160 (1821) \Tahanus) : Macq., Dipt. Exot. i. p. 112 (1838) ; 



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



Univ. Quart, iii. p. 19.3(1895), under Tabanus T-ni(fruin. — S. America. 

 Jj. Januarii, $ , Wiedem., Zool. Ma<r. iii. p. 43 (1819) ; id. Dipt. Exot. i. 



p. 94 (1828); id. Au.^s. zweifl. Jn.s. i. p. 162 (1828) (Tabanus); 



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



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



— Brazil and Rio Janeiro. 

 Z>. alcicorni*, 2, Wiedem., Aus^s. zweifl. Ins. i. p. L58 (1828) [Tabanus) ; 



