PAMPHILIUS INANITUS. 101 



larva had a brighter and somewhat broader head, and 

 the antennse were white. De Geer, who correctly de- 

 scribed the imago, states that the larva feeds on Prunus 

 padus. 



Not common, Clydesdale, Thornhill, London district, 

 Devonshire (Stephens). 



Continental distribution: Sweden, Germany, Holland, 

 France, Switzerland, Italy, Russia. 



Y. THE GROUP OF INANITUS. 



Head black ; behind the eyes and below the antennae yellow ; 

 thorax black, except pronotum; abdomen black, broadly 

 fulvous in middle. Legs straw-yellow. Sutures on vertex 

 deep, the lateral going down to antennae ; the ocelli with a 

 furrow before and behind, and from the former a furrow 

 proceeds to the middle of front. Head between the antennae 

 slightly carinated. Antennae 21-jointed, yellow at the base, 

 the rest testaceous ; third joint not much longer than fourth. 



The yellow and black stigma, the antennas yellow at 

 base, and with the third joint not much longer than 

 the fourth, readily separate this from some of the 

 species of the depressus group, with which it has a 

 general resemblance in coloration. 



6. PAMPHILIUS INANITUS. 



Vol. II, PL VI, fig. 6, ? ; 6 a, Base of Antenna ; 6 b 9 

 Leg. Yol. II, PL XII, fig. 13, Case of Larva after 

 Westwood. 



Tenthredo inanita, Vill., E. L., iii, 125, 137, pi. vii, f. 11 (1789). 

 Lyda inanis, Klug, Berl. Mag., ii, 278, 13 ; Htg., Blattw., 347, 



22; Thorns., Hym. Sc., i, 308, 13. 



inanita, Lep., F. Fr., pi. xiv, f . 6 ; Mon., 12, 35 ; Ste., 111., 

 vii, 100, 12 ; Andre, Species, 499, pi. xxii, f. 6; 

 Cat., 62,* 25; Giraud, Yerh. z.-b. Ges. Wien, 

 1861, 90. 

 fallax, Lep., Mon., 13, 37. 



Black, shining ; the face below the antennae, a large curved fascia 

 behind each eye, extending to the edge of the head behind and becoming 

 narrower as it does so. Tegulaa and edge of pronotum yellow ; the 

 second to fifth abdominal segments fulvous; the apical segment 

 yellow ; legs yellow, the apex of tibise and tarsi with a ferruginous tinge. 



