3. CHRYSOPS 435 



triangle well connected along the hindmargin with the entirely yellow sides ; 

 third segment black Avith a narrow dull yellowish hindmargin which widens 

 upwards at the middle and forms a rather large ill-defined equilateral triangle 

 which is not extended to the foremargin, and with all the sidemargins left 

 yellowish ; fourth segment with similar but less distinct markings, and also 

 sometimes with the sidemargins entirely yellow ; fifth segment with very vague 

 similar markings which leave considerably more than the hinder half slightly 

 yellowish ; sixth and seventh segments mainly but obscurely yellow dusted ; 

 pubescence short but abundant, pale yellow except on the black parts. Belly 

 obscure dull yellowish on the second segment except for a roundish middle 

 basal spot ; foremargins of the second to fourth segments widely but obscurely 

 and shallowly black, but on the remaining segments obscure dark yellowish ; 

 hindmarginal hems yellow with yellow fringes. 



Legs similar to those of C. quadrata, but the dorsal black fringe on the 

 hind tibiae less coarse and less conspicuous. 



Wings almost as in C. crecvtiens, but slightly more hyaline on especially 

 the basal cells, though not so hyaline as in C. quadrata; sometimes the 

 clouding on the lower basal cell covers almost all the cell except a continua- 

 tion of the hyaline space of the upper basal cell (Parknasilla, July 15, 1901, 

 Colonel Yerbury) ; the second and third posterior cells not so much 

 darkened as in 0. ccecutiens and C. relicta, while many of the blackish mark- 

 ings may be more correctly described as brownish ; the pale spot in the 

 submarginal cell broader than in the allied species. 



Length about 9-5 mm. 



This species is closely allied to C. ccecutiens and G. quadrata, but C. 

 ccecutiens may be known at once by all its tibise being black in both sexes; 

 G. quadrata has the hind tibiae black in the male, and in that sex the 

 pleurse and sidemargins of the base of the abdomen also bear black 

 pubescence; the female of G. quadrata has the second segment of the 

 abdomen all yellow except a small black basal spot. A remarkable form 

 of this species was taken by Colonel Yerbury at Kenmare in Kerry on 

 July 2, 1901 ; the specimens are larger, broader and darker in both sexes, 

 but in the male with more orange coloring about the sides of the third 

 and fourth abdominal segments and with the pubescence on the orange 

 part of the second segment almost all black though not conspicuously so ; 

 in the female the abdomen is more ovate and the specimens have a richer 

 orange appearance; the antennse are all black, with the basal joints slightly 

 more bristly ; the facial calli large ; the pubescence on the abdomen and 

 legs more conspicuous and more orange, and the orange markings on the 

 hindmargins more conspicuous. Another variety of the female, taken by 

 him at Nairn on July 17, 1904, has the facial calli very small and almost 

 entirely outside the facial protuberance, thus forming a moderately narrow 

 black line down the inner edge of the sides of the face close against the 

 bulging middle part of the face and quite isolated from all the other calli. 

 A female taken at Tangham Forest near Wood bridge in Suffolk on August 

 26, 1907, has the wing-markings unusually blackened but with a rather 

 distinct somewhat hyaline kernel to the discal cell and a long subhyaline 

 streak in the submarginal cell ; the cubital cell is also more hyaline except 

 on the upper part ; the outer margin of the middle cross-band is much more 

 definite ; the ground colour of the face and frons is paler grey, and the 

 facial calli are small and well separated from the oral callus ; the palpi 

 are blacker ; and the yellow base of the abdomen is paler, and in fact the 

 triangle on the middle of the second secernent is almost whitish. 



G. relicta is common and widely distributed from at least Devonshire 

 (Torcross) to Assynt, Inverness, Nairn, and Brodie, while numerous Irish 



