BRACHYCYRTINE WASPS — WALKLEY 323 



Genus Brachycyrtus Kriechbauraer 



Brachycyrtus Kriechbaumer, Corres.-Blatt. Zool.-Min. Ver. Regensburg, vol. 34, 



p. 161, 1S80. Genotype: Z?/-ac/i!/r!/;7i^s ornaiws Kriechbaumer, by monotypy. 

 Proterocrypius Ashmead, Proc. U. S. Nat. Mus., vol. 30, p. 174, 1906. Genotype: 



Proterocryptus nawaii Ashmead, by monotj'py. 

 Vakau Cheesman, Ann. Mag. Nat. Hist., ser. 10, vol. 1, p. 189, 1928. Genotype: 



Vakau taitensis Cheesman, by monotypy and original designation. 

 Brachycyrtomorpha Blanchard, An. Soc. Cient. Argentina, vol. 134, p. 105, 1942. 



Genotype: Brachycyrlomorpha crossi Blanchard, by monotypy and original 



designation. 



Genotype: Bracliycyrtus ornatus Kiiechbaumer, by monotypy. 



The members of tliis genus, t3rpe genus of the tribe Brachycyrtini, 

 are more or less brightly colored, usiiall}' black and yellow or white, 

 rufous or testaceous brown and yellow or j^ellov.ish white, and more 

 or less patterned. In addition to the tribal characters heretofore 

 mentioned and the characters given in the generic key, they are 

 further identified b}^ the antennae having 24 to 27 segments with the 

 first flagellar segment three to four times as long as wide; by the head 

 being more than tv.ice as broad as long wdth very short, slightly 

 convex temples (fig. 1,6); b}^ the petiole with the sternite straight or 

 more or less upcurved apically; the usuall}^ short but distinct ster- 

 naulus; and the propodcum perpendicular beyond the short basal area. 



The synonym Brachycyriomori^ha has been credited previously by 

 some authors to Kreibohm de la Vega (1940). However, under the 

 International Rules of Zoological Nomenclature (Article 25, as 

 emended) the genus must date from 1942 vdth Blanchard as its author, 

 since before that date there had been no summary of characters, no 

 bibliographic reference, and no type designation. 



Key to the species of Brachycyrtus 



1. Propodcum with dense whitish pubescence and completely areolated, the areola 



separated from the petiolar area 2 



Propodcum with pubescence not dense and with areola and petiolar area 

 confluent 3 



2. Thorax reddish yellow, with whitish markings preliosus Cushman 



Thorax whitish, with reddish yellow and piceous markings. 



crossi (Blanchard) 



3. Thorax black or blackish, with pale markings .... ornatus Kriechbaumer 

 Thorax yellow or yellowish, marked with brown or black 4 



4. Thorax yellow, faintly marked with reddish yellow or testaceous. 



australis Roman 

 Thorax yellow, marked with black or dark brown 5 



5. Size large, more than 8 mm. in length; abdomen yellow with black band at 



base of each of segments 2-6 baltazarae, new species 



Size smaller, 7 mm. or less in length; abdomen dark brown or black with yellow 

 band at or near apex of each of segments 1-7 6 



