94 LARRIDE. 
clavate. The aBDoMEN ovate, subsessile, the posterior mar- 
gins of the segments depressed. 
Type, D. pictus. 
+4+ This genus was established by Jurine in 1807; it 
had been previously moved about from genus to genus, 
according to the peculiar views of the several writers, which 
tends to prove how very unstable all kinds of subdivisions 
among these insects were previous to the publication of 
Jurine’s book. The name is from 8wyrtis, to move in a 
circle, I presume from its flight; but I have not had the 
pleasure of seeing it alive, therefore I cannot say; but if 
such be the case, it resembles Astata in that peculiarity. 
Sp. 1. prietus. Fab. 
levis, niger, thorace maculato, abdomine ferrugineo fasciis 
tribus flavis, ano ngricante 9. 
fronte flavd, antennis cochleatim retortis 4. 
length 3—3} lines. 
Jurine, 209, Pl. 11. G. 26; Latr. Nouv. Dict. 9. 471; Guer. Dict. 
Class. 5. 515. 
Crabro pictus. Fab. E. 8. 2. 299. 20; Panz. 17.19 ¢. 72.10 9. 
ceraunius. Rossi, Mant. 2. App. 123. 11. 
Spher guttata. Fab. E. S. 2. 215. 72. 
Pompilus pictus. Fab. Piez. 196. 43, 
guttatus. Fab. E. S. Sup. 252. 34; Piez. 196. 44. 
Larra picta. Latr. H. 13. 296; Spin. 1. 73. 4. 
Black: head punctured; base of the mandibles yellow, apex 
rufo-piceous, and a yellow line at the superior edge of the pos- 
terior margin of the eyes; the face and clypeus covered with 
a silvery pubescence. 
Thorax punctured ; an interrupted transverse band upon the 
collar; the tegulz, the tubercles, and a transverse line at the 
scutellum, yellow; the metathorax, with a central slight longi- 
tudinal impression terminating in a deeper point, with oblique 
