154 CRABRO CLYPEATUS. 



Crabro lapidarius, Fabr. Syst. Piez. 309. 6. 

 Van d. Lind. Obs. ii. 55. 14. 

 Smith, Cat. Brit. Hym. p. 120. 



Thyreopus clypeatus, St. Farg. Ann. Soc. Ent. Fr. iii. 758. 4 C T . 

 Solenius lapidarius, St. Farg. Ann. Soc. Ent. Fr. iii. 721. 8 ^ ; 

 Hym. \\\. 117. 1. 



Female. Length 4 lines. Black, punctured ; head quadrate, as 

 wide as the thorax, very closely punctured, subconfluent ; the 

 clypeus covered with silvery pubescence ; the scape and basal 

 joint of the flagellum yellow. Thorax coarsely punctured, the 

 punctures confluent, running into lines on the scutellum ; a 

 narrow line on each side of the anterior margin of the protho- 

 rax, the tibiae, tarsi, and femora towards their apex, yellow, the 

 apical joints of the tarsi fuscous ; wings subhyaline, the ner- 

 vures testaceous, the tegulae rufo-piceous. Abdomen closely 

 punctured ; each segment with a broad yellow fascia, the first 

 three interrupted. 



Male. Length 4 lines. Black ; head and thorax deeply and very 

 closely punctured ; the head narrower than the thorax, and nar- 

 rowed into a neck behind, depressed in the middle before the 

 ocelli ; the scape and two or three of the basal joints of the fla- 

 gellum yellow, the rest fulvous beneath; the clypeus covered with 

 silvery pubescence. Thorax elongated and narrowed in front ; 

 the metathorax truncated and transversely rugose, and having 

 a deep central longitudinal channel ; the wings fusco-hyaline, 

 with the nervures and tegulae testaceous ; the legs yellow, with 

 a black line beneath the anterior and intermediate femora; 

 the posterior femora black, with a yellow line in front ; the tibiae 

 rufo-fuscous within, with a dark stripe in front ; the anterior 

 tibiae dilated behind ; the basal joint of the tarsi expanded into 

 a subrotund concavo-convex plate, the two following joints 

 slightly dilated. Abdomen punctured; each segment with a 

 yellow fascia, the first four more or less interrupted ; beneath, 

 the second with a large subquadrate macula, which is widest 

 behind, and produced at the lateral angles ; the third, and some- 

 times the fourth, with a yellow band. 



I have carefully examined the typical specimen in the Linnean 

 Cabinet, and can detect no difference between it and a specimen 

 which I captured in 1848 at Wey bridge. Shuckard says the 

 Linnean insect differs from his C. vexillatus, but he does not state 

 in what particulars; I confess I could not detect any. In 1853 

 I captured the C. lapidarius very near the spot where I had for- 

 merly taken C. clypeatus. I have little doubt it is the female of 

 the latter ; the habit of the insects is the same. 



