CRABRO LINDENIUS. 15? 



the tavsi with the basal, sometimes the two basal joints, yellow, 

 the rest fuscous ; the anterior tarsi slightly ciliated, all the 

 tibiae spinose. Abdomen ovate, with five yellow bands more or 

 less interrupted, the second sometimes entire, the third formed 

 of two transverse ovate spots ; the apical segment forming a 

 grooved obtuse spine, the sides covered with golden setae. 



Mule. Length 3^-4 lines. — Black ; the scape yellow beneath ; 

 the second to the fifth joints of the flagellum beneath emargi- 

 nate, produced into a tootli at their apex, the first and second 

 teeth longest; the clypeus, inner orbits of the eyes, and the 

 cheeks, covered with silvery pubescence. Thorax : the meta- 

 thorax more strongly sculptured than in the female ; the yellow 

 lines on the collar frequently obsolete ; the anterior tibiae and 

 femora reddish yellow in front, with a black line behind ; the 

 intermediate femora with a narrow yellow line in front at their 

 apex, the tibiae yellow, with a black line behind ; the posterior 

 femora with a yellow spot at their apex above, the tibiae yellow, 

 with a black line inside ; the four anterior tarsi yellow, with the 

 extreme base black ; the basal joint of the intermediate tarsi 

 produced beneath near its apex, and spinose. Abdomen : the 

 second yellow band sometimes entire, the three following widely 

 interrupted, the fifth sometimes entire, the sixth always so. 



Wesmael, who had the opportunity of examining Van der 

 Linden's insects, decides that this is the fossorius of that author ; 

 and the female is, I think, certainly the chrysostomus of St. 

 Fargeau. 



This species burrows in decaying wood, particularly the trunks 

 of old Willows. It provisions its cells with Diptera. I have 

 several times reared the sexes from pieces of willow stumps. It 

 is generally distributed. 



&*■ 



** Antenna of the males simple ; their tarsi also simple. 

 33. Crabro Lindenius. 



C. niger, flavo-maculatus, stemmatibus in lineam curvam positis ; 

 metathoracis basi longitudinaliter striato. 



Crabro Lindenius, Shuck. Foss. Hym. 143. 10. 

 Crabro interruptus, Dahlb. Hym. Eur. i. 418. 275 ? 

 Crabro striatus, Dahlb. Hym. Eur. i. 321. 35. 

 Wesm. Hym. Foss. Belg. 156. 35. 



Female. Length 6-7 lines. — Black ; head large, subquadrate, 

 pubescent, and rather wider than the thorax ; a slightly im- 



