118 TENTHREDOPSIS SORDIDA. 



Ab. a. ? . Abdomen marked with black above on 

 the basal segments. 



Ab. 1}. 3 . Sutures of mesopleurse lined with black. 



Ab. c. $ . Sutures of mesonotum marked with 

 yellow. 



The largest of the testaceous species. Easily known 

 by the long spurs and interstitial second recurrent 

 nervure. Common in June. Clydesdale, New Gallo- 

 way, Rannoch, Lochaweside, Mull, London district, 

 Norwich. 



Continental distribution : Sweden, Holland, Ger- 

 many, France, Italy, Hungary, Russia. 



21. TENTHREDOPSIS SORDIDA. 

 PL XVIII, fig. 6, Saw. 



Tenthredo sordida, Klug, Berl. Mag., viii, 199, 143; Htg., 



Blattw., 308, 36; Evers., Bull. 

 Mosc, xx, 49, 21. 



Perineura sordida, Thorns., Hym. So., i, 266, 3 (ex parie) ; 



Andre, Species, i, 433, Cat., 53,* 9. 



Tenthredopsis sordidus, Cam., Tr. Ent. Soc., 1881, 572. 



Luteous ; sparsely covered with a white pubescence, mandibles, 

 labrum, clypeus, orbits of eyes, edge of pronotum, scutellar spots, bright 

 yellow ; abdomen with a broad, almost continuous, black band running 

 down the back ; coxae pale yellow, marked with white at side ; pleurae 

 marked with pale yellow at the juncture of the three divisions 

 antennae longish, slender, the apical joints marked with fuscous colour 

 above, the third joint not much longer than fourth, Wings hyaline, 

 nervures blackish, costa testaceous, stigma fuscous, white at base. 

 Clypeus truncated at apex. Middle furrow on vertex distinct behind 

 ocelli, and prolonged between them into a deeper channel ; frontal area 

 not well defined; antennal tubercles largo, projecting. 



$ black ; mouth, orbits, tegulse, pronotum, a broad band on pleura?, 

 and the greater part of the coxae, white ; hind tibiae and femora more or 

 less fuscous-black; abdomen reddish-testaceous, black in the centre 

 above ; anal segment with two deep fovese. 



Length 3f 4 lines. 



The smallest of the yellow species. The colour is 

 paler than in nassata or inornata, the head has the 

 yellow brighter and wider round the eyes, the coxse 

 and trochanters pale yellow, marked with white, while 

 in nassata they are of the same colour as the body, 



