TEXAN HYMENOrTERA. 213 



Should the variety with black abdomen prove to be a distinct species, 

 it may be named illustris. 



Sphex ichneninonea. 



Sphex ichneumonea, Linn. Syst. Nat. ii., p. 959. 



Seven £ $ specimens. (Belfrage; Boll; Heiligbrodt.) 



Sphex dubitata, n. sp. 



<?.— Differs from ichneumonea, as follows; — Form more slender; the face, 

 clypeus, sides of mesotliorax, spot beneath tegulae and metathorax clothed with 

 dense silvery pile, instead of bright golden; the mandibles and scape entirely 

 black; the wings pale yellowish-hyaline, with dusky apical margin, instead of 

 uniformly fuscous; the coxae with silvery pile; otherwise as in ichneumonea. 

 Length .85 inch. 



Three specimens. (Belfrage.) 



Priononyx atrata. 



Sphex atrata, St. Farg. Ilym. iii., p. 355. 



Three % $ specimens. (Belf'rage ; Boll.) 



Priouonyx Tlioime. 



Sphex Thomoc, Fabr. Ent. Syst. ii., p. 199. 

 One $ , four % specimeus found abundantly on Sumach flowers in 

 August. (Belfrage.) The abdomen of the $ specimen is entirely 

 yellow-ferruginous, except petiole; while that of the % specimens ia 

 more or less varied or bauded with black ; the %> specimens have also 

 quite a dense clothing of silvery pubescence. 



Priouonyx brunnipes, n. sp. 



% . — Black, clothed with black pubescence, face and clypeus faintly silvery 

 in certain lights; mandibles toward tips and scape beneath at tips dull red- 

 dish; thorax entirely black, without any silvery markings; metathorax opaque, 

 upper surface sparsely and indistinctly punctured, with a very shallow longi- 

 tudinal central depression, widened posteriorly, sides somewhat obliquely 

 striated; tegulre pale luteous on outer margin, base brown; wings fuscous; 

 legs dark brown, coxae and femora before black ; abdomen shaped as in Thonioe 

 %, dark brown, varied with black at apex, petiole black. Length .65 inch. 



One specimen found on Sumach flowers in August. (Coll. G. W. 

 Belfrage.) Very distinct from TJwmse by the total absence of silvery 

 pubescence. 



LAKKIDiE. 



ILarrada triloba. 



Lyropx(Lyroda) triloba, Say, Bost. Journ. Nat. Hist, i., p. 372. 

 Two specimens. (Belfrage.) 



Larrada sub if a. 



Lyrops (Lyroda) subita, Say, Bost. Journ. Nat. Hist, i., p. 372. 

 One specimen. (Belfrage.) 



