rO-MPILID.E. 



173 



18G7), paralyzes it with its formidable sting, and inserting an 

 egg in its body, places it in its nest, dug to the depth ol" five 

 inches. There is but a single brood, 

 produced in June, which is killed off by 

 the frosts of November. This species 

 feeds in summer ''upon the honey and 

 pollen of the flowers of the Polder, and 

 of Vitis ampelopsis^ the Virginia Creeper ; 

 but its favorite nourishment is taken from 

 the blossoms of Asdepias quadrifolmm." 

 (Lincecum.) P. cylindricus Cresson (Fig. 93, wing) is one of 

 our smallest species, being 

 IVom three to five lines 

 long. It occurs in the 

 South and West. P. arctus 

 Cresson (Fig. 94, wang) in- 

 habits Colorado Territory. 

 J\ Clarice Cresson (Fig. 95, 

 ? enlarged) is a beautiful 

 and rare species found in 

 Pennsylvania. The genus 

 Priocneviis is characterized 

 J)y the two hind pair of 

 tibiiE being serrated ( 5 , 

 Fig. 96, o, wing; b, pos- 

 terior leg ; c, anterior leg), and by the want of spines on the an- 

 terior legs. P. unifasciatus Say is a wide-spread species and 



readily recognized by the deep black 

 color of the body, the 3'ellow an- 

 tennae and the large yellow spot at 

 the tip of each anterior wing. 



The genus Agenia (Fig. 97, o, 

 wing ; b, posterior leg) differs in 

 having smooth legs. A. brevis Cres- 

 Fig. 96. son (Fig. 98, wing) is a little spe- 



cies found in Georgia. A. comjruus Cresson (Fig. 99, wing) 

 was captured in West Virginia ; and A. acceptus Cresson (Fig. 

 100, wing) in Georgia. The genus Notocyplms (Fig. 101, 

 ?, wing) is found in Brazil and Msxico. Planiceps (Fig. 102, 



Tig. 95. 



