104 BULLETIN 66, UNITED STATES NATIONAL MUSEUM. 



dibles at base 0.15 mm. Cephalothorax light yellow with brown 

 band at base, half on the thorax and half on the first abdominal; as 

 long as broad, subtrapezoidal, squarely truncate at apex; truncation 

 less than one-third the breadth at the spiracles. Lateral margin sinu- 

 ate. Mandibles rounded, obtuse, with a small acute, curved tooth at 

 apex. Posterior margin of mouth straight. Spiracles dorsal, just 

 reaching lateral margin. 



Type.— Cat. No. 10092, U.S.N.M. 



ig. STYLOPS IMITATRIX, new species. 



Host. — Andrena (Trachandrena) imitatrix Cresson (det. IT. L. Vier- 

 eck); Round Mountain, Texas. Described from one female (pi. 3, 

 fig. 10). 



Female. — Length of cephalothorax 0.89 mm., breadth at spiracles 

 0.89 mm., breadth at base of head 0.52 mm., distance between man- 

 dibles at base 0.14 mm. Cephalothorax light yellowish brown with 

 a darker-brown band at base; as long as broad, truncate deltoid; 

 truncation less than one-fourth the breadth at the spiracles. Lat- 

 eral margin slightly constricted at base of mandibles and at base of 

 head. Mandibles subquadrate with large tooth at inner apical angle 

 and with blunt prominent tooth on outer edge at middle. Posterior 

 margin of mouth straight. Spiracles dorsal, just reaching lateral 

 margin. 



Type.— Cat. No. 10093, U.S.N.M. 



20. STYLOPS MULTIPLICATiE, new species. 



Host. — Andrena multiplicata Cockerell; Milwaukee, Wisconsin, 

 June 9, 1904, May 2, 1904; S. Graenicher, collector. Described 

 from two females presented to the writer by Doctor Graenicher (pi. 3, 

 fig. 11). 



Female. — Length of cephalothorax 0.87 mm., breadth at spiracles 

 0.90 mm., breadth at base of head 0.62 mm., shortest distance between 

 mandibles 0.12 mm. Cephalothorax light yellowish brown with black 

 band at base, half on the thorax and half on the first abdominal; 

 almost as long as broad, subtrapezoidal, truncate at apex; truncation 

 less than one-fourth the breadth at the spiracles. Lateral margin 

 slightly convex. Mandibles subquadrate, with an acute curved tooth 

 at inner apex and slight indication of a convex protuberance on outer 

 edge midway between inner tooth and base. Spiracles laterally 

 prominent. 



Type.— Cat. No. 10094, U.S.N.M. 



2i. STYLOPS NASONI, new species. 



Host. — Andrena nasoni Robertson (metatype det. H. L. Viereck) ; 

 Ashbourne, Pennsylvania, April 19, 1897. Described from one 

 female (pi. 4, fig. 1). 



