INVESTIGATIONS ON THE MUTILLH) WASPS 261 



This species is related to the preceding one but is easily dis- 

 tinguished by the differences in the color of the pubescence. It has 

 been confused with magna and may be separated from the latter by 

 the structure of the femora at the apex. The paratypes vary in 

 length from 11 mm. to 17 mm. 



Group OBSCURA 



Females with the head as wide or wider than the thorax ; thorax 

 pyriform; scutellar scale absent; pygidium granular; femora of 

 middle and hind legs squarely truncate at the apex, the faces of 

 the truncation sulcate. Males with the clypeus very prominently 

 bidentate medially: second sternite without a median pit densely 

 filled with hairs ; middle and hind femora modified at the apex like 

 those of the females. 



111. DASYMUTILLA OBSCURA (Blake) 



Plate 4, fig. 30 



Mutilla {Sphaerophthalma) obsoura Blake, Trans. Amer. Ent. Soc, vol. 3, 



p. 239, 1871, male. 

 Mutilla {Sphaerophthalma) scaevola Blake, Trans. Amer. Ent. Soc, vol. 3, 



p. 247, 1871, female. 

 Mutilla admctus Blake. Trans. Amer. Ent. Soc, vol. 4, p. 74, 1872, male. — 



Blake, Trans. Amer. Ent. Soc, vol. 7, p. 244, 1879, male. — Dalle Tobke, 



Cat. Hymen., vol, 8, p. 6, 1897, male. — Fox, Trans. Amer. Ent. Soc, vol. 



25, p. 245, 1899, male. 

 Mutilla obscura Blake, Trans. Amer. Ent. Soc, vol. 7, p. 244, 1879, male. — 



Dalle Torre, Cat. Hymen., vol. 8, p. 67, 1897, male.— Fox, Trans. Amer. 



Ent. Soc, vol. 25, p. 245, 1899, male. — Melandeb, Trans. Amer. Ent. Soc, 

 y vol. 29, p. 300, 1903, male, female. 

 Mutilla scaevola Blake, Trans. Amer. Ent. Soc, vol. 7, p. 245, 1879, 



female. — Dalle Torre, Cat. Hymen., vol. 8, p. 84, 1897, female. — Fox, 



Trans. Amer. Ent. Soc, vol. 25, p. 241, 1899, female. 

 Sphaerophthalma macer (macerata) Blake, Trans. Amer. Ent. Soc, vol. 



13, pp. 227, 286, 1886, male. 

 Sphaerophthalma admetus Blake, Trans. Amer. Ent. Soc, vol. 13, p. 229, 



1886, male. 

 Sphaerophthalma obscura Blake, Trans. Amer. Ent. Soc, vol. 13, p. 231, 



1886, male. 

 Sphaerophthalma scaevola Blake, Trans. Amer. Ent. Soc, vol. 13, p. 241, 



1886, female. 

 Mutilla macera Dalle Toebe, Cat. Hymen., vol. 8, p. 56, 1897, male. 

 Ephuta (Ephuta) admetus Ande^, Gen. Ins., vol. 1, fasc 11, p. 57, 1903, 



male. 

 Ephuta {Ephuta) obscura Ande£, Gen. Ins., vol. 1, fasc 11, p. 62, 1903, 



male. 

 Ephuta {Ephuta) scaevola Andb6, Gen. Ins., vol. 1, fasc. 11, p. 63, 1903, 



female. 

 Mutilla {Dasymutilla) apachea Viebeck, Trans. Amer. Ent. Soc, vol. 33, 



p. 386, 1907, male. 



