REVISION OF STREPSIPTERA PIERCE. 137 



Male. — A little larger than Pseudoxenos heydenii; antennae more 

 slender; legs pale." 



3. PSEUDOXENOS CORCYRICUS Saunders (1872). 



Paraxenos corcyricus Saunders, 1872. 



Host. — Hoplomerus (Odynerus) spinipes Linnaeus; Corey ra, May. 



The description of this species was also brief. 



Male. — Differs from Paraxenos erberi by its shorter antennae, 

 broader antenna! rami, legs very long, slender, luteous. Length 

 | line. & 



4. PSEUDOXENOS HEYDENII Saunders (1852). 



Xenos heydenii Saunders, 1852. 

 Pseudoxenos heydenii Saunders, 1872. 



Host. — Odynerus deflendus Saunders; Epirus, Corcyra, July- 

 October. 



This species may be described as follows : 



Male. — Very black; antennal rami densely clothed with minute 

 white tubercles; wings hyaline, with veins piceous; legs luteous. 

 Length 1 line. c 



14. LEIONOTOXENOS, new genus. 



Type of genus. — Leionotoxenos jonesi Pierce. 



Name derived from Leionotus (the host genus) + Xenos (the typical 

 parasite genus). 



This genus is formed to include those forms which are parasitic 

 upon the genus Leionotus and is at present confined to North America. 

 The form of the female shows it to be typically xenid as does also the 

 triungulinid. 



The genus is composed of three species : 



jonesi Pierce, parasitic on Leionotus colon Cresson ; Louisiana. 



louisianse Pierce, parasitic on Leionotus vagans Saussure; Louisiana. 



hoolceri Pierce, parasitic on Leionotus verus Cresson; Texas. 



« Prsecedente (Ps. heydenii) paulo major; antennis subtilioribus pedibus pallidis. 

 Habitat Epirum, cum Odynero Isevipede, Shuck. (0. rubicola Dufour et Perns), 

 in rubis exsiccatis, cellulas limosas construente, ex quibus imagines, cum alumnorum 

 pupariis expositis, Maio mense exeunte evadunt (Saunders, 1S72, 45). 



&A prsecedente (Paraxenos erberi) dirfert antennis brevioribus, ramis latioribus, 

 pedibus cunctis longissimis, tenuibus, luteis. Long. corp. § lin. Habitat Insulam 

 Corcyram cum Odynero spinipede L., cujus exemplar, marium puparia quatuor sub- 

 abdominis segmentis 2°, 3°, 4°, et 5°, superne alternatim dextra sinistraque exhibens, 

 in sabuletis die Maii lectum; e quibus die 22 ejusdem mensis imagines tres obtinui 

 (Saunders, 1872, 46). 



cAterrimus; antennarum rami tuberculis minutis albis dense bullati; alis hyalinis 

 neuris piceis, pedibus luteis. Long. corp. 1 lin. Habitat Epirum et Insulam Cor- 

 cyram, Odyneri dcjlendi alumnus; a Julio ineunte usque ad Octobris idus, mares in 

 pupariis cum altoribus lecti; foeminse parturientes quoque diebus Julii decimo tertio, 

 Augusti nono, et Octobris undecimo, cum eadem Odyneri specie prehensse (Saunders, 

 1872, 45). 



