REVISION OF STREPSIPTERA PIERCE. 149 



HALICTOXENOS, new subgenus, 

 i. HALICTOXENOS JONESI Pierce (1908). 



Host. — Halictus (Chloralictus) , species; Texas; near Logansport, 

 Louisiana, June 7, 1905, W. D. Pierce, collector; Mound, Louisiana, 

 May 12, 1905, C. R. Jones, collector (pi. 13, figs. 1, 2, 3). 



Male. — These specimens were given a name, although in both cases 

 they were males extracted from the puparium. The xenid antennae 

 were sufficient to place the genus properly. The maxillary palpus is 

 large and flattened and at least as long as the maxilla. The balancers 

 are as long or longer than the rami of the antenna?. The cedeagus is 

 evenly curved near base but not enlarged, resembling that of Apracte- 

 lytra; the tip could not be made out. The wings are dark and the 

 venation is strong. 



Cephalotheca: The antennal analogues are nearly circular and 

 lie next to the eye and less than one-half their breadth from the 

 arched vertex which lies between them. The mandibular analogues 

 are prominent, acute and considerably nearer the pharynx than the 

 eyes. The maxillary analogues are represented by an ovate ring with 

 a very slight median lobe. They are very near the eyes, nearer by 

 their width than the mandibles. 



Named in honor of C. R. Jones, the writer's former associate. 



Type.— Cut. No. 12669, U.S.N.M. 



2. HALICTOXENOS CRAWFORDI, new species. 



Host — Halictus bruneri Crawford, cotype, June 10, 1901, West 

 Point, Nebraska, on honeysuckle; J. C. Crawford, collector (No. 202) 

 (pi. 12, fig. 1). 



Female. — Length of cephalothorax 0.57 mm., breadth at spiracles 

 0.61 mm., breadth at base of head 0.28 mm., distance between man- 

 dibles 0.09 mm. Cephalothorax very light yellowish brown, darker 

 on basal margin, the dark band extending back over the brood canal; 

 pyriform about as long as broad, suddenly constricted at base, widest 

 behind spiracles, thence rapidly convexly narrowing to base of head, 

 thence oblique, almost straight to mandibles, apically convex trun- 

 cate; spiracles not laterally prominent; mandibles reaching lateral 

 margin, broader at base than apex, emarginate truncate at apex, 

 outwardly widening toward base. 



Triungulinid : Length 0.12 mm. Resembles in general the triun- 

 gulinid of Stylops. 



Type.— Cat. No. 10106, U.S.N.M. 



This species is named in honor of J. C. Crawford, of the U. S. Na- 

 tional Museum, who is an authority on the genus Halictus in America, 

 and who collected the type of the species. 

 84359— Bull. 66—09 11 



