496 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



Family XENID^ Semenov. 

 Genus HALICTOXENOS Pierce. 



HALICTOXENOS GR^ENICHERI Pierce. 



Correction: This specific name was wrongly spelled on page 150 of 

 Bulletin 66, but correctly on pages 147 and 148, where it was also 

 defined; hence the correct spelling holds and not grxincheri. 



HALICTOXENOS NYMPHiEARI, new species. 



Host. — Ohloralictus nymphsearum Robertson (det. Robertson), Car- 

 linville, Illinois. Described from one female collected by Charles 

 Robertson. 



Female. — Length of cephalothorax 0.55 mm., breadth at spiracles 

 0.52 mm., breadth at base of head 0.26 mm., distance between mandi- 

 bles 0.07 mm. Cephalothorax yellow, with an orange brown band at 

 base, which has its posterior margin on the abdomen semicircular. 

 Cephalothorax longer than broad, convexly truncate at apex, con- 

 stricted at base of head, and also behind spiracles. Apical truncation 

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

 obliquely convex from spiracles to base of head, thence convex and 

 almost parallel, rounding evenly into the convex apex. Spiracles 

 lateral but not prominent. Mandibles small, obtuse, apically 

 emarginate. 



Type.— Cat. No. 13694, U.S.N.M. 



HALICTOXENOS VIRIDUL.-E, new species. 



Host. — Augochlora viridula Smith (det. Robertson), Carlinville, 

 Illinois. Described from one female collected by Charles Robertson. 



Female. — Length of cephalothorax 0.73 mm., breadth at spiracles 

 0.85 mm., breadth at base of head 0.33 mm., distance between mandi- 

 bles 0.08 mm. Cephalothorax light yellow, with a small semielliptical 

 brown spot at the center of the base which extends on the base of 

 the abdomen as a broad band from one side to the other. Cephalo- 

 thorax considerably wider than long, truncate at apex, constricted 

 at base of head, strongly constricted behind spiracles. Lateral 

 margin strongly sinuate, with the depressions at the base of the 

 head and a little in front of the spiracles. Mandibles set obliquely, 

 narrowed toward apex, which is squarely truncate but with a minute 

 denticle on the inner apical angle. Spiracles marginal, but not 

 prominent. Abdomen with five genital tubes. 



Type.— Cat. No. 13695, U.S.N.M. 



