FAM. XEXID.F. 21 



I. Subgenus HALICTOXENOS, Pierce 



Halictoxenus. Pierce, Proc. Ent. Soc. Wash. Vol. 9. p. 82 (1908); Bull. U. S. Xat. Mus. no. 66, 

 p. 148 (1909). 



Type of subgenus. — H.jonesi, Pierce. 



Geographical distribution of species. — Parasites of Halictine bees of the subgenus 

 Chloralictus. 



1. H. crawfordi, Pierce, Bull. U. S. X T at. Mus. no. 66, p. r.4.9, pi. 12, f. 1 Xebraska. 



(1909). 



2. H. gratnicheri, Pierce, ibidem, p. i5o, pi. 12, f. 2 (1909). Wisconsin. 



3. H.jonesi, Pierce, Proc. Ent. Soc. Wash. Vol. 9, p. 84. (1908); Bull. Texas, Louisiana. 



U. S. Xat. Mus. no. 66, p. t4, pi. i3. ft. i-3 (1909). — PI. 2, 

 Fig. 3; PI. 4, Fig. 21. 



4. H. nymphaeari, Pierce, Proc. U. S. Xat. Mus Vol. 40. p. 496(1911). Illinois. 



5. H. spars:', Pierce, Bull. U. S. Xat. Mus. no. 66, pp. i5o, i5i, pi. 12. Oklahoma. 



f. 3 (rqog). 



6. H. versa/:. Pierce, ibidem, p. i5o, pi. 12, f. 4 (1909). Wisconsin. 



7. H. zephyr:, Pierce, ibidem, p. 150(1909). Wisconsin. 



2. Subgenus HALICTOPHILUS, Pierce 



Halictophilus. Pierce, Bull. U. S. Xat. Mus. no. 66, p. 148 (T909). 



Type of subgenus. — H. manilae, Pierce. 



Geographical distribution of species. — Parasites of Halictine bees of the subgenus 

 Evylaeits. 



S. H. manilae, Pierce, Bull. U. S. Xat. Mus. p. i5i, pi. 12. f. 5(1909). Philippines. 



9. H. robbii, Pierce, ibidem, p. i5i. pi. 12, f. 6 (1909). Philippines. 



3. Subgenus HALICTOSTYLOPS, Pierce 



Halictostylops. Pierce, Bull. U. S. Xat. Mus. no. 66, p. 112 (1909). 



Characters. — Female. — Cephalothorax triangular from stigmatal angles, narrowly truncate 

 at apex: mandibles marginal; spiracles not lateral. Abdomen with five median genital tubes on the 

 second to sixth segments. 



Triungulinid. — Similar in form to that of Slylops. Tenth abdominal segment short, triangular, with 

 two ventral tubercles as long as the segment and each bearing a long stylet. 



Type of subgenus. — H. spend:, Xassonow. 



Geographical distribution of species. — Parasites of bees of the genus Halidus. 



10. H. spencii, Xastonow. England, continental Eu- 



Haliclophagus spencii, Xassonow, Warsaw University Xews, no. 9. pp. 1 V -J2 rope. 



pi. 1, if. 10-12 1 i8g3). 

 Halictophagns curtisii. Xassonow, Enl. Untersuch. pp. 93-97. pi. 1, ff. 10-12 



(1893 . 

 Halictostylops spencii. Pierce, hull. U. S. Xat. Mus. no. 66. pp. 112, n3 11909 . 



