HEMIGASTER. 35 



This genus may at once be known from Macrogaster by its 

 complete metanotal area?, angled and intercepted second recurrent 

 of the hind wing, and the much shorter terebra. 



Cameron says (Manch. Mem. 1899, p. 193) that Hemigaster has 

 the same neuration as Macrogaster, but that in other respects it is 

 very dissimilar : in not having the mesonotum trilobate, the 

 spiracles between the centre and apex of the petiole, the three 

 basal segments greatly enlarged, the head smaller and the petiole 

 bicarinate. Though he considered Macrae/aster to belong to the 

 PIMPLED, he would place his species of Hemigaster between the 

 IcHKEUMoiuiirjE and CEYPTI>*^E ; they are, however, associated in 

 a small group by themselves, in the middle of the CBTPTINJE, by 

 both Ashmead and Dalla Torre, possibly for no better reason than 

 that Brulle placed them in his third "type," Les Cryptus, in which 

 section, however, was also included Agriotypus, Curt. ! 



Table of Species. 



1 (2) Postpetiole 4-carinate ; face infuscate ; flagellar 



band weak fasciatus, Brul. 



2 (1) Postpetiole 2-carinate ; face red ; flagellar band 



clear white carinifrons, Cam. 



7. Hemigaster fasciatus, Brul. 



Hemigastei- fasciata, Bralle", Hist. Nat. Ins. Hym. iv, p. 267, tig. ( ). 



A red species with a broad abdominal band, the posterior legs 

 partly, and the white-baiided antennae, black. Head red, with 

 the face and vertex laterally, and the lower orbits of the eyes, 

 infuscate ; face longitudinally prominent in the centre ; mandibles 

 apically black. Antennte black, with the first two joints and base 

 of the third red, and an incomplete central flagellar band flavescent. 

 Thorax subpubescent, with the mesonotal notauli narrow, the lobes 

 not at all convex, and the central one longitudinally subsulcate ; 

 metanotum broadly and deeply sulcate almost throughout, the 

 petiolar area bicostate and divided into three polygonal areae ; 

 apophyses distinct and obtuse. Abdomen red, with the three basal 

 segments closely punctate ; basal segment with four longitudinal 

 discal carinae and a longitudinal black stripe on either side of the 

 disc; second with a black band, laterally rounded and not extending 

 to the side margins, occupying the basal two-thirds ; third segment 

 basally subinf uscate ; terebra 25 millim. in length. Legs red, 

 with the anterior tarsi more or less infuscate ; hind legs with the 

 tarsi entirely, and femora and tibiae towards their apices, black. 

 Wings hyaline, with the nervures rufescent. 



Length 10 millim. 



" INDES OKIENTA.LES." 



