140 CRABRO PALLIDIPALPIS. 



more or less interrupted in the middle ; the wings hyaline and 

 iridescent, with a faint cloud beyond the middle, the tegulae and 

 nervures piceous ; the anterior tibiae in front, and the interme- 

 diate and posterior ones at the knees, yellow ; the tarsi piceous, 

 the basal joint of the intermediate and posterior pairs pale at 

 the base ; the intermediate and posterior tibiae spinose. Ab- 

 domen shining and finely punctured, the sides and the fifth 

 segment with a delicate silvery down ; the apical segment 

 strongly punctured, the lateral margins raised, the extreme 

 apex rufescent. 



The Male differs in having the antennas fimbriated beneath, and 

 the scape yellow in front ; the anterior and intermediate tibiae 

 yellow in front, and the posterior pair at their base. 



This species is abundant about London ; it has also been 

 taken at Loch Rannoch in Perthshire. 



19. Crabro pallidipalpis. 

 C. niger, elongatus ; metathorace laevi. 



Crossocerus pallidipalpis, St. Farg. Ann. Soc. Ent. Fr. iii. 779. 15 ; 



Hym. 182. 15. 

 Crabro propinquus, Shuck. Pass. Hym. 168. 27. 



Female. Length 3-3| lines. Black ; head shining and minutely 

 punctured ; a delicately impressed line between the stemmata 

 which passes just beyond them, and a deeper one in front of the 

 anterior stemma which extends to the face ; the inner orbit of 

 the eyes, the clypeus, and lower portion of the cheeks covered 

 with a silvery pubescence ; the scape with a yellow line out- 

 side ; the apex of the mandibles rufo-piceous. Thorax shining 

 and minutely punctured; the mesothorax with two central 

 parallel longitudinal lines at the base which extend to the disk, 

 and two shorter lateral ones ; the metathorax smooth and 

 shining, with a cruciform consute incisure, the transverse one 

 curving upwards ; the posterior portion beyond the enclosed 

 space with scattered punctures ; the collar with usually a pale 

 yellow dot on each side ; the wings slightly coloured, the ner- 

 vures and tegulae piceous ; the anterior tibiae in front, and the 

 intermediate and posterior pairs at their base, yellow ; the tarsi 

 rufo-piceous, the posterior pair with their extreme base paler. 

 Abdomen subclavate and slightly pubescent, the apex piceous. 



The Male differs in having the antennae fimbriated beneath, and 

 the intermediate tibiae yellow in front. 



Occurs occasionally in the London district, and has been taken 

 at Lowestoft, Suffolk. 



