^^'=-' '914-] Banks: PsAMMOCPiARiD.E. 301 



POMPILOIDES. 



This genus can be divided into two sections or subgenera; the 

 typical one includes P. cylindricus; the pronotum in this section is 

 angulate behind (except in P. subviolaceus) , the third joint of an- 

 tennae in the female is plainly longer than the fourth joint, and there 

 is no distinct comb to the front tarsi. The other section, which may 

 be called Nanopompihis, since it includes A'', argenteiis, has the pro- 

 notum arcuate or nearly straight behind ; the female has a very dis- 

 tinct comb on the front tarsi, and the third joint of the antennae is 

 no longer than the fourth. This section includes argcntcus, con- 

 similis, hyacinthinus, minusculus, padriniis, and parvus, and of those 

 with red on the abdomen, rtifihasis, antumnalis, and pretiosa. 



Pompiloides autumnalis new species. 



Female. — Black, with basal half of abdomen red, and pronotum with a 

 silvery hind margin. Clypeus truncate in front ; front with long hair ; vertex 

 straight across, hairy; antennx slender, third joint about three fourths of the 

 vertex width, no long hair on basal joint beneath; posterior ocelli slightly 

 nearer to eyes than to each other; pronotum broadly arcuate behind, posterior 

 margin, except a median spot, with silvery pubescence, pronotum above with 

 long hairs ; metanotum short, rounded, with silvery pile, most noticeable on 

 the sides, no long hair above, with a median line ; abdomen red on first, second 

 and most of third segments above, below red on the first and second seg- 

 ments, apical and ventral segments with long hairs. Legs slender, black, a 

 few hairs under middle of femur I, all strongly spined, inner spur of hind 

 tibia more than one half of metatarsus. Wings smoky, apex darker, third 

 cell subtriangular, shorter than the second, receiving the second recurrent vein 

 a little beyond the middle, basal vein interstitial with the transverse. Length, 

 10 to 12 mm. 



From Ridgeway, Ontario, Canada, Sept. (Van Duzee), and 

 Chicago, 111., Sept. (Brues). 



Differs from P. semirufus in white-margined pronotum, in long 

 hair on pronotum, and longer hair on front, and strong comb on 

 anterior tarsi. 



Pompiloides autumnalis var. atlanticus new variety. 



This variety has been taken by Mr. Howard Shannon at Long Beach, 

 L. I., in August and September on the sea beach. As far as I can see it does 

 not differ much in structure from the typical form, but the pronotum is entirely 

 black, no trace of the white posterior border, the wings are darker in all the 



