DIPTEEA. 



stripe, and a sublateral reddish-olivaceous one, and a complete lateral yellow stripe. 

 In only one specimen is the band of the second abdominal segment * ondulee " ; in 

 the others it is straight, and not at all interrupted. 



The following species have also been described from Mexico 



Mesogramma ectypum, Say, Journ. Acad. Phil. vi. p. 165 ; Complete Writings, ii. 



p. 359 (Syrphus).— Mexico. 



lineare, v. d. Wulp, Tidjschr. v. Ent. xxvi. p. 5 (Mesograpta).— Mexico. 



bicinctum, Bigot, Ann. Soc. Ent. Fr. 1884, p. 112 (Mesograpta).— Mexico. 



bistrigum, Bigot, loc. cit. 1884, p. 110 (Mesograpta).— Mexico. 



heraldicum, Bigot, loc. cit. 1884, p. 109 (Mesograpta).— Mexico. 



lacrymosum, Bigot, loc. cit. 1884, p. 108 (Mesograpta).— Mexico, Brazil. 



maculatum, Bigot, loc. cit. 1884, p. 111 (Mesograjpta). — Mexico, Cuba, 



Brazil. 



mu, Bigot, loc. cit. 1884, p. 105 (Mesograpta).—M.exico. 



trilobatum, Bigot, loc. cit. 1884, p. 109 (Mesograpta).— Mexico. 



quinquecinctum, Bigot, loc. cit. 1888, p. 254 (Mesograpta).— Mexico. 



quinquemaculatum, Bigot, loc. cit. 1888, p. 254 (Mesograpta).— Mexico. 



Certain specimens here considered as belonging to M. mutuum would agree well 

 with the description of M. ectypum, save for the " tergum black, edged all round with 

 yellow ; second segment with two yellow dots." 



SALPINGOGASTEE,. 



Salpingogaster, Schiner, Reise der Novara, Diptera, p. 344 (1868). 



» 



Synopsis of the Central-American species. 



1. Red and yellow species ; legs in great part yellow .... 2. 

 Black species ; legs in great part black 3. 



2. Legs wholly yellow (female) pygophora, Schiner. 



Tarsi and hind legs in part black cothurnata, Bigot. 



3. Sides of the metanotum with a yellow spot ; a projection of 



the brown anterior border rnnning back over the cross-veins 



of the wings. Length ] 1 millim limbipennis, sp. n. 



Sides of the metanotum without yellow spot ; cross-veins not 



clouded. Length 15-18 millim nigra, Schiner. 



