252 HYMENOPTEKA. 



Hal. Mexico l (Salle), Amula in Guerrero 6000 feet (H. H. Smith), North Yucatan 

 (Gaumer) ; Guatemala, El Tumbador (Champion). 



Head rather shining, strongly punctured, more sparsely on the vertex ; thinly covered 

 with long pale hair ; clypeus sharply carinate in the middle ; the mandibles black, 

 fringed with long fulvous hair. The scape of the antennae deep black, sparsely covered 

 with long fulvous hair ; the flagellum paler coloured, owing to its being thickly covered 

 with a pale fuscous pile. The pronotum strongly punctured, the punctures distinctly 

 separated, the centre finely and closely punctured, the oblique basal part impunctate; 

 the mesonotum with fewer and more widely separated punctures than the pronotum, 

 the sides impunctate; the scutellum punctured like the mesonotum; the median 

 segment opaque, the apex rather strongly transversely striolate and oblique. The hair 

 on the thorax is long and white. The abdomen has bluish reflections ; the yellow 

 marks are on the first, second, and third segments ; the penultimate segment has scat- 

 tered punctures and is sparsely covered with white hair ; the pygidium is longitudinally 

 striolated, and is thickly covered with long pale soft hair ; the ventral segments are 

 punctured and bear long white hair at the apex. The legs bear long white hair ; the 

 calcaria are white ; the tarsi have the spines rufous. 



Our specimens may not really belong to M. sexmaculata (Guer.), which has no yellow 

 on the thorax ; but otherwise they agree with Guerin's description. In one or two 

 examples there are eight marks on the abdomen. 



The punctuation of the mesonotum varies in strength. The example from Guatemala 

 has a yellow mark below the hind wings. 



** Wings hyaline, suffused along the costa. (Species 6-13.) 

 Abdomen with spots only. (Species 6-8.) 



6. Myzine toluca. 



Nigra, maculis abdominis 8 flavis, postscutello flavo ; alis fusco-hyalinis, anfcice fumatis. § . 

 Long. 15 millim. 



Hal. Mexico, Presidio de Mazatlan (Forrer). 



Head below the ocelli coarsely, above them sparsely, punctured ; the clypeus not so 

 strongly punctured as the front ; the mandibles reddish towards the middle, their hair 

 golden-fulvous. The scape of the antennae shining, bearing a few punctures and some 

 long pale hairs. The pronotum closely and not very strongly punctured throughout. 

 The mesonotum to the furrows very finely and closely punctured ; the other part with 

 a few not very large punctures. The scutellum with scattered punccures, except down 

 the middle. The median segment opaque, the centre rough and closely punctured. 

 The breast and pleurae covered with long white hair ; the pronotum densely covered 

 with shorter fuscous hair; the mesonotum almost glabrous; the median segment with 



