MYZINE. 251 



In size the males vary from 9 to 14 millim., and they vary also in coloration. The 

 femora may be entirely black. The coloration of the median segment shows consider- 

 able variation : it may be as in the type, but with the black apical mark larger and 

 entire, or it may be black, with two or three yellow marks ; the mesopleurse may be black, 

 with one or two yellow marks ; and the metapleurse may be entirely black. The mark- 

 ings on the basal abdominal segment also vary : the projecting part of the black may 

 be oval, square, or conical, without a neck at its base ; the projection varies in length, 

 and may disappear entirely. The yellow on the mesonotum may become obsolete, and 

 the apical segment of the abdomen may have two yellow marks instead of one, as is 

 more generally the case. 



4. Myzine sexcincta. 



Scolia sexcincta, Fabr. Syst. Ent. p. 356 1 ; Ent. Syst. ii. p. 236 2 . 



Elis sexcincta, Fabr. Syst. Piez. p. 248 3 . 



Myzine sexcincta, Latr. Gen. Crust, et Ins. iv. p. 112 4 ; Smith, Cat. Hymen. Ins. iii. p. 78 8 ; 



Cresson, Trans. Am. Ent. Soc. iv. p. 200 6 . 

 Plesia sexcincta, Lepel. de St.-Fargeau, Hist. Nat. Ins. Hymen, iii. p. 584 7 . 

 Tiphia maculata, Fabr. Syst. Piez. p. 233 8 . 

 Plesia maculata, Guerin, Revue Zool. 1838, p. 58 9 . 

 Tiphia namea, Fabr. Syst. Piez. p. 233 10 . 



Plesia namea, Lepel. de St.-Fargeau, Hist. Nat. Ins. Hymen, ii. p. 577 u . 1 

 Meria collaris, Say, Bost. Journ. Nat. Hist. i. p. 362 12 ; Complete Writings, ii. p. 748 13 . 

 Myzine subulatus, var., Say, Bost. Journ. Nat. Hist. i. p. 301 14 ; Complete Writings, ii. p. 743 15 . 



Hob. Noeth America 5 , Carolina 7 9 10 n Georgia 8 , Indiana 12 , % Texas 6 .— Mexico 14 . 

 — Antilles 2 3 . 



This species has been recorded from Carolina and Georgia by Fabricius and by 

 Cresson from Texas ; but Cresson, in his " Catalogue of North-American Hymenoptera " 

 (Trans. Am. Ent. Soc. 1887, Supplement, p. 268, nota) remarks that M. sexcincta 

 probably " does not really occur in our [i. e. Nearctic] fauna, but is confined to the 

 West-Indian Islands, from whence the type was described." 



The Mexican record is from Say 14 , who states that a variety inhabits Mexico in 

 which the abdominal bands are less abruptly emarginate on each side. 



I have not seen a specimen of M. sexcincta from within our limits. 



b. Legs black. (Species 5-14.) 

 * Wings violaceous. (Species 5.) 



5. Myzine sexmaculata. (Tab. XII. fig. 19.) 



Plesia sexmaculata, Gruerin, Revue Zool. 1838, p. 57 \ 



Nigra, postscutello maculisque sex abdominis flavis ; alis fuliginosis. $ . 



Long. 22 millim. 



2ke 2 



