PASSALCECUS GRACILIS. IJ3 



ginal cells, the first oblong, receiving the first recurrent nervure 

 near its apex, the second broader than long, and narrowed 

 towards the marginal cell, receiving the second recurrent nervure 

 about the middle ; the legs destitute of spines. Abdomen elon- 

 gate, with a very short petiole, and having the second segment 

 constricted at its base, the third being slightly so; the apex 

 produced into an upcurved spine in the male. 



1. Passaloecus insignis. 



P. atra ; mandibulis palpisque flavis ; corniculo inter antennas 



obsoleto ( ? ), porrecto ( 3 )• 



Pemphredon insignis, Fan d. Lind. Obs. ii. 79. 3 $ (non ? ). 

 Diodontus insignis, Curtis, Brit. Ent. fol. 797. pi. 797. 

 Passalcecus insignis, Shuck. Foss. Hym. 189. 1. 



Dahlb. Hym. Europ. i. 248. 148. 



Wesm. Hym. Foss. Bely. 122. 4. 



Female. Length 3 lines.— Black ; the disk of the thorax and 

 the abdomen shining ; the head very finely and closely punc- 

 tured ; an impressed line runs from the anterior ocellus to the 

 middle of the face; the clypeus obsoletely tridentate ; the 

 labrum triangular ; the scape in front, the mandibles, and the 

 palpi, yellowish white. Thorax : the mesothorax and the scu- 

 tellum very delicately punctured; the metathorax coarsely 

 rugose ; the tubercles white behind ; the wings hyaline and 

 iridescent, the tegulse testaceous, the nervures piceous; the 

 apex of the femora, and the tibia? and tarsi ferruginous, the 

 posterior tibiae frequently with a dark stain in the middle. 

 Abdomen very finely punctured, the margins of the three basal 

 segments constricted. 



Male. Length 2J lines.— Differs in having the face silvery, and 

 in having a short acute spine or horn between the antennae, 

 the tibiae and tarsi yellow, and in having an upcurved spine at 

 the apex of the abdomen. 



Abundant, and generally distributed, frequenting the flowers 

 of the Bramble. I have frequently bred this insect from perfo- 

 rated rose-sticks ; but I have not observed it carrying its prey. 



2. Passaloecus gracilis. 



P. atra ; mandibulis macula lactea ; corniculo in utrisque sexibu 

 deficiente. 



