304 A. L. MELANDEE. 



formly fuliginous except that the second subraarginal ends in a subhyaline spot. 

 This continues basallyjust within the second submarginal as a subhyaline streak, 

 crossing the center of the first submarginal and ending at the base of the stigma. 

 Veins and stigma black, marginal cell longer than the first submarginal, bluntly 

 acuminate, second submarginal shorter than the first, strongly narrowed toward 

 the marginal, receiving the recurrent nervure at the middle. In one specimen 

 the pentagonal third submarginal and the third discoidal are vaguely denned, in 

 the other wholly wanting. 

 Length, 7.25-10.5 mm. 



Two males. Forest Hill, Mass., August 31, 1898 (Samuel Hen- 

 shaw), and Woods Hole, Mass., August, 1900. 



Henshawi is placed with the species of the group pennsylvanica 

 because of its rudimental eyes and the neuration of the wing. It is 

 quite different, however, from the other males of the division in the 

 form of the first abdominal segment, which is quite sessile with the 

 second, as in the females. If this character be considered of more 

 importance than the other, the species would be placed in the West- 

 ern group anthophorce with the species adonis Fox, or thamyras Fox. 

 From these slender species the new form is obviously far removed. 



54. >l ill ilia pennsylvanica Lepeletier (91). 



Four specimens from Fedor, Texas (Birkman). May-October. 



55. >lulilhi auripilis Blake (92). 



Not rare in Central Texas, occurring at Fedor and Austin. 



56. V| hi ilia jason Fox (93j. 



One specimen taken by the writer at Austin, Texas. 



57. Mutilla balteola Blake (94). 



Plate IV, fig. 32 ; petiole. 

 Not rare at Fedor and Austin, Texas. One specimen differs in 

 the reduced white fasciae of the abdomen ; that of the second seg- 

 ment bears no median projection anteriorly. 



Group imperialis. 



The species of this group and of the next are closely related, 

 forming the old genus Photopsis of Blake as far as the males are 

 concerned. Were it not for the numerous species here included, it 

 would be well not to attempt to subdivide this group, at least not 

 on the grounds taken. The division into genera, such as Odonto- 

 photopsis, is equally untenable, as the sexual character chosen from 

 one sex is subject to great variation. For this reason the species 



