158 CRABRO ALBILABRIS. 



pressed line runs backwards from the anterior ocellus beyond 

 the posterior pair ; it also extends forwards, less slightly im- 

 pressed, to the deep canaliculation of the face ; the inner orbit 

 of the eyes and the clypeus densely covered with silvery pubes- 

 cence ; the clypeus carinated in the centre ; the scape and man- 

 dibles yellow, the latter rufo-piceous at their apex. Thorax : 

 the mesothorax transversely striated before the tegulse, the 

 hinder portion longitudinally so; the scutellum, and a semi- 

 circular enclosed space at the base of the metathorax, longi- 

 tudinally striated, the posterior portion of the latter transversely 

 striated; an interrupted line on the collar, the tubercles, a 

 transverse stripe at the base of the scutellum with a united 

 minute dot at each end, yellow; the tibia3, tarsi, and sometimes 

 the tips of the femora, yellow ; the anterior tibiae beneath and 

 a spot beneath the intermediate pair black; the apical joints of 

 the tarsi rufo-piceous, the anterior pair slightly ciliated outside, 

 and the intermediate and posterior tibiee spinose. Abdomen : 

 each segment with a broad yellow fascia, frequently entire, 

 sometimes the third and fourth more or less interrupted ; the 

 sides of the apical segment yellow, deeply canaliculated above, 

 with the margins of the channel fringed with rigid yellow setae. 



Male. Length 5-5 i lines. Antennas 12-jointed, the scape yel- 

 low in front ; the mandibles with sometimes a yellow line on 

 their inner margin ; the clypeus with silvery pubescence ; the 

 collar with a yellow spot on each side, sometimes obsolete ; 

 the thorax striated as in the female; the legs yellow, with 

 the anterior femora behind, the intermediate pair behind and 

 beneath, and the posterior pair black, the tibiae usually with a 

 dark stain behind ; the apex of the basal joint of the inter- 

 mediate tarsi produced beneath ; the abdomen fasciated as in 

 the female, but with an additional band, the fasciae are usually 

 more interrupted ; the apical segment with a longitudinal 

 groove. 



This conspicuous and very distinct species is not frequently 

 taken ; it must be very local : I have only found it at Darenth 

 Wood, in July, and once at Southgate ; it also occurs at Ripley 

 in Surrey, and near Bristol. 



34. Crabro albilabris. 



C. niger; capite thoracis latitudine; metathoracis basi longitudi- 



naliter striato ; abdomine ovato-conico, nigro-viridi. 

 Mas. Tibiis tarsisque flavis. 



