32 ICHNEUMONIDJE. 



genus in the group oE Macrogaater in 1899 ; and, in any case, the 

 distinct sternauli and exserted terebra exclude it from the ICHNEU- 

 MONIN.E. Originally Cameron considered the present genus to 

 belong to the section of ICHNEUMONIK^: with the metathoracic 

 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 invisibly 

 telescoped remainder. 



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

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

 and typical species of a basal scutellar fovea and the obtusely 

 bidenfate mandibles of the second, are points of considerable 

 structural dissimilarity. I have seen this genus in the British 

 Museum ; it bears a strong superficial resemblance to Hemic/aster* 

 Females alone are at present known. 



Table of Species. 



1 (2) Black, with flavous markings, the coxae and 



base of antennae black fnlvijies, Cam. 



2 (1) Red, with the coxae and base of antennae 



concolorous. ... t lutea, Cam. 



5. Chreusa fnlvipes, Cam. 



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



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

 slightly broader than the thorax and narrow behind the eyes; 

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

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

 marked clvpeus strongly punctate and sparsely white-pilose ; 

 vertex strongly punctate and frous deeply excavate. Antennae a 

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

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

 Thorax closely and strongly punctate and white-pilose ; notauli 

 and scutellar fovea wanting ; pleurae coarsely sculptured, with tlie 

 propleiiraD basally bright pale fulvous ; metanotum flavous, rugoselv 

 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 cari 1133 distinct; rnetapleurse flavescent, 

 closely and transversely strigose. Scutellum 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 long as the second, with its sides, apex 

 and basal half flavous, centrally bicarinate, with the apical h:ilf 

 strongly and closely punctate and white-pilose ; the closely 

 punctate second and third segments apically and laterally flavous ; 



