32 ICHNEUMONID^. 



genus in the group ot" Macrogaster in 181)9 ; siiid, in any case, the 

 distinct steriiauli and exserted terebra exclude it from the Ichneu- 

 MOJ^iN.E. Originally Cameron considered tlie present genus to 

 belong to the section of IcHNEUMONiKyE with the nietathoracic 

 spiracles linear and those of the petiole between the centre and 

 apex, though differing from all known groups in the inflated 

 three basal segments, the elevated apex of the third and inAisibly 

 telescoped remainder. 



That tiie two species placed in this genus by Cameron are really 

 homogeneous I consider open to doubt: the absence in tlie first 

 and typical species of a basal scutellar fovea and the obtusely 

 bidentate mandibles of the second, are points of considerable 

 structural dissimilarity. I have seen this genus in the Eritisli 

 Museum ; it bears a strong superficial resemblance to Hemirjaster. 

 Pemales alone are at present known. 



Table of Species. 



1 (2) Black, with flavous marking's, the coxae and 



base of anteniiEe black fulvipes, Cam. 



2 (1) Red, with the coxfe and base of anteuufe 



concolorous. ...:....-. lutea, Cam. 



5. Chreusa fulvipes. Cam. 



Chreusa fulvipes, Cameron,* Manch. Mem. ]899, p. 210 ($). 



A very profusely flavous-marked species, with red legs. Head 

 slio-htly broader than the thorax and narrow behind the eyes; 

 black, "with the epistoma, clypeus, palpi, inner orbits throughout 

 but broader apicaily, stramineous ; face and the centrally black- 

 marked clypeus strongly punctate and sparsely white-pilose ; 

 vertex strongly punctate and frons deeply excavate. Antenuce as 

 long as the body, black, with the apices dilated and piceous ; 

 ioints eight to sixteen, and underside of scape, pale stramineous. 

 TJwrax closely and strongly punctate and white-pilose ; notauli 

 and scutellar fovea wanting ; pleurte coarsely sculptured, \vith the 

 propleura; basally bright pale fulvous ; metanotum fiavous, rugosely 

 punctate, convexly declivous and basally obliquely impressed ; 

 areola short and broad, laterally curved and obliquely constricted, 

 emitting a carina extending to the apex from each of its apical 

 angles ; apophyses large, laterally broadly dilated, with a round 

 fovea on the top ; lateral carina? distinct ; metapleuroe flavescent, 

 closely and transversely strigose. Scutelluiji rugose and densely 

 white-pilose, black, with its strongly strigose sides and rounded 

 apex broadly, and the postscutellum entirely, white. Abdomen 

 black; basal segment as loug as the second, with its sides, apex 

 and basal half flavous, centrally bicarinate, with the apical half 

 strongly and closely punctate and white-pilose ; the closely 

 punctate second and third segments apicaily and laterally flavous ; 



