256 ALLOTRIA NIGRIVENTR1S. 



marked reddish hue, not clear citron-yellow ; the radial 

 cellule is wider and not quite so long, and the third 

 abscissa of the radius is much more distinctly curved. 

 Hartig describes the oral region, antennae, legs, and 

 alarnervures as " obscure castaneous-red," our species 

 thus differing in having the antennae of two colours. 



Rare. Gloucestershire. 



Continental distribution : Germany. 



27. ALLOTRIA OASTANEA. 



Xystus castaneus, Htg., Germ. Zeits., ii, 351 and 352, 19. 



Castaneous-red ; joints 1 6 of antennae and legs clear yellow, the 

 apical joints of antennae fuscous ; the apical half of the abdomen 

 blackish ; wings hyaline, the nervures pale yellow. Antennas rather 

 stout, longer than the body ; the third joint a little longer than the 

 fourth, neither it nor the fourth being curved. Radial cellule elongate, 

 more than twice longer than broad ; the nervures pale. 



Length 1| mm. 



This is a larger and stouter insect than Galedonica 

 and piceomaculata. Piceomaculata has the head casta- 

 neous, and the thorax has not the clear testaceous-red 

 of castanea ; the antennae are much blacker, and the 

 abdomen is only reddish at the base, while in castanea 

 the abdomen is red, black only at the extreme apex. 

 The infuscated legs of Caledonica with the much 

 shorter radial cellule sufficiently distinguish it. 



Rare. 



Germany. 



28. ALLOTRIA NIGRIVENTRIS. 

 PI. XVII, fig. 4. 



Allotria nigriventris, Thorns., Oef., xviii, 409, 13. 



Bufo-testaceous, the thorax tinged with piceous ; the antennae 

 yellowish-testaceous, infuscated towards the apex; the legs clear 

 yellow ; wings hyaline, the nervures fuscous. Antennae longer than the 





