54 HYMENOPTERA ACULEATA. 



as to be paralyzed, at least, so far as onr English species 

 have been observed in this matter. Fabre, Nouv. Souv. But., 

 p. 210, mentions a spider which he took awny from a 

 Salius which lived in a fresh but immobile condition for 

 seven weeks. They are rarely to be met with except in 

 bright sunshine, as they hide, or crouch unseen, as soon as 

 the sunshine passes away. The characters of the family 

 are the long pronotum, which is usually angularly or 

 arcuately emarginate posteriorly, the long slender legs with 

 very large coxfe, the intermediate pair contiguous, the 

 two-spurred intermediate tibias and the penicilli on the 

 eighth dorsal segment of the S ! the abdomen in the cj is 

 as a rule longer and narrower than in the ? . 



(2) 1. Vertex not punctured .... Pompilus. 



(1) 2. Vertex closely puncturecl. 



(10) 3. Antennas inserted almost immediately 



aboTe the clypeus : sheaths of the sting 



retractable into the apical segment in 5 . 



(7) 4. Wings with the anterior basal transverse 



nervure not uniting with the posterior. 

 (G) 5. (J basal segment of the abdomen not long, 



and subpetiolate, posterior tibi^ of the 



$ serrate Salius. 



(•".) 6. (J basal segment of the abdomen very 



long and subpetiolate, posterior tibia; of 



the ? simple Pseudagenia. 



(1) 7. Anterior and posterior basal nervures 



uniting. 

 (9) 8. Maxillse bearded at the base ; ? posterior 



tibia3 simple . . , . . . . Agenia. 



(8) 9. Maxillfe not bearded; ? posterior tibia; 



serrate Calicuroiis. 



("•) 10. Antenna; inserted at some distance above 

 the clypeus; 5 with the f- heaths of the 

 sting always exscrted beyond the apex 

 of the abdomen Ceropales. 



POMPILUS, Fab. 



A very extensive genus, the number of whose species 



is probably quite uncertain ; the male characteristics are 



well defined, whereas those of the female are often most 



obscure, and almost defy appreciation. It used to bo split 



