INVESTIGATIONS ON THE MUTILLID WASPS 155 



Legs very dark red, shining, very sparsely clothed with long, black 

 hairs. 



Holotype.—FQmdilQ, Del Rio, Tex., June 22-27 (Wickham), in 

 collection of American Museum of Natural History. 



Paratypes.—Q females, Del Rio, Tex., June 22-27 (Wickham) ; 

 female, Victoria, Tex., September 10, 1907 (J. D. Mitchell) ; female, 

 Cuero, Tex., June 19 (Townsend). Paratypes in collections of 

 American Museum of Natural History, University of Minnesota, 

 United States National Museum, and the author. 



Several of the paratypes have the apical fringes of the sternites 

 broadly yellow at the sides, rather than very narrowly yellow as in 

 the holotype. One paratype is much larger, length 11.5 mm., and 

 has the integument almost black, although the reddish color is still 

 apparent. 



The general appearance of this species, the dark head and thorax 

 with yellow abdomen, and its small size distinguish it at once. The 

 absence of a carina on the antennal scrobes above separates it from 

 all the other species of a like habitus, except gorgon and leda. 

 The relative length of the first segment of the flagellum with the 

 second and third segments distinguishes it from the two latter. In 

 lauta the first segment is distinctly shorter than segments two and 

 three united, while in gorgon and leda the first segment is equal in 

 length to segments two and three united. 



50. DASYMUTILLA SULCATULLA, new species 



Female. — Very dark mahogany red, almost black, the front, vertex, 

 dorsum of thorax, and second abdominal tergite clothed with 

 appressed and erect, dense, golden yellow pubescence, the apical 

 fringe of the second abdominal tergite, and tergites 3-5 clothed with 

 pale golden pubescence; pygidium longitudinally striate; length, 

 13 mm. 



Head very dark mahogany red ; front and vertex clothed with long, 

 appressed and erect, golden yellow pubescence; genae very sparsely 

 clothed with dark pubescence ; mandibles acute at the tip, unidentate 

 within (about one-third the total length of the mandible, from the 

 tip); anterior margin of the clypeus bidentate medially; anterior 

 half of clypeus glabrous, impunctate, the posterior half densely, 

 finely punctate, clothed with long, dark hairs forming a clypeal 

 fringe; scape with indistinct moderate punctures; first segment of 

 flagellum less than twice as long as it is wide at the apex; about 

 equal in length, ventrally, to segments two and three united; seg- 

 ments 3-10 with a broad, deep, longitudinal groove dorsally, the 



