912 Hymenoptera in America North of Mexico 



dactylopii (Ashmead). Tex. w. to Calif. Host: Phenacoccus solenopsis Tins., Leiicopis sp. 



predaceous on Phenacoccus gossypii Towns, and Ckll., Pseiidococcus ephedrae (Coq.). 

 Signiphora dactylopii Ashmead, 1900. U. S. Natl. Mus., Proc. 22: 410. 9. 

 elongatus (Girault). N. J. s. to Ga., w. to S. Dak., Calif. Host: Coccus hesperiduvi L., 



Pseudococcus comstocki (Kuw.), coccid on Muhlenhergia, Acerophagus notativentris 

 (Gir.), Achrysopophagus modestus Timb., Anagyrus yuccae (Coq.), Clausenia purpurea 

 (Ishii), Pseudleptontastix squamnnilata Gir., Tetrastichus minutus (How.), Zarhopalus 

 corvinus Gir. 

 Neosigniphora elongata Girault, 1916. Psyche 23 (2): 41-42. 9. 



Taxonomy: Timberlake, 1924. Calif. Univ., Pubs. Ent. 3 (2): 246-248. — Novitzky, 1954. Univ. 

 Milano Bol. di Zool. Agr. e Bach. 20: 207. — Ferriere, 1957. Opusc. Zool. 10: 6. 



Biology: Clausen, 1924. Calif. Univ., Pubs. Ent. 3 (2): 257-266, 281-284. —Clancy, 1944. Jour. 

 Econ. Ent. 37 (3): 451. 

 fasciatus (Girualt). Tex. w. to Calif. Host: Coccus viridus Green, Melanaspis lilacina (Ckll.), 

 Parasaissetia nigra (Nietn.). 

 Signiphora fasciata Girault, 1913. U. S. Natl. Mus., Proc. 45: 206, 219-220, 221, 229. S, 9. 



Biology: Arnaud, 1959. Ent. News 70 (6): 163 (primary parasite). 

 mexicanus (Ashmead). Calif. Host: Aspidiotus hederae (Vallot). 



Signiphora niexicana Ashmead, 1900. U. S. Natl. Mus., Proc. 22: 411. 9. 

 niger (Ashmead). N. Y. s. to Fla., 111., Calif. Host: Aphycus lounsburyi (How.), Chrysomphalus 

 aoniduni (L.), Clausenia purpurea Ishii, Coccus hesperidum L., Pseudococcus comstocki 

 (Kuw.), Leptoviastidea abnonnis (Gir.), Saissetia oleae (Oliv.). 

 Signiphora nigra Ashmead, 1900. U. S. Natl. Mus., Proc. 22: 410. 9. 



Taxonomy: Smith and Compere, 1928. Calif. Univ., Pubs. Ent. 4 (9): 242, 245, 332-334. 



Biology: Compere, 1925. Calif. Univ., Pubs. Ent. 3 (3): 296. —Clancy, 1944. Jour. Econ. Ent. 

 37 (3): 451. 

 nigrellus (Girault). Tex. Host: Melanaspis tenebricosus (Comst.). 



Signiphora nigrella Girault, 1913. U. S. Natl. Mus., Proc. 45: 215. 9. 

 pulcher (Girault). N. J. s. to N. C, 111., Ark. Host: Aulacaspis rosae (Bouche), Chionaspis 

 anierica)ia Johns., Lecanium nigrofasciatuni Perg., Pseudaulacaspis pentagona 

 (Targ.-Tozz.), Quadraspidiotus peniiciosus (Comst.). 

 Signiphora pulchra Girault, 1913. U. S. Natl. Mus., Proc. 45: 215-217, 229. 6, 9. 

 Signiphora nigrita Girault, 1913. U. S. Natl., Mus., Proc. 45: 215. 

 unifasciatus (Ashmead). Ga., Fla. Host: Ceropsylla sideroxyli Riley. 



Signiphora unifasciata Ashmead, 1900. U. S. Natl. Mus., Proc. 22: 410. 9. 



Genus THYSANUS Walker 



Thysanus Walker, 1840. Ann. Nat. Hist. 4: 234. 



Type-species: Thysaiius ater Haliday. Monotypic. 

 Triphasius Foerster, 1856. Hym. Stud. v. 2, pp. 83, 84. Unnecessary new name. 

 Plastocharis Foerster, 1856. Hym. Stud., v. 2, p. 145. Unnecessary new name. 

 Neosigniphora Rust, 1913. Ent. News 24 (4): 164. 



Type-species: Neosig)iiphora nigra Rust. Monotypic. 



Species of Thysanus are hyperparasites of armored scale insects. Two species are known. 



Taxonomy: Silvestri, 1918. Lab. Zool. Gen. e Agr. Portici, Bol. 12: 266-271. — Nikol'skaya, 

 1950. Doklady Akad. Nauk SSSR 75 (2): 319-321. -Ferriere, 1953. Schweiz. Ent. Gesell., 

 Mitt. 26 (1): 5. — Yoshimoto, 1965. Pacific Insects 7 (4): 703-704. — Rozanov, 1965. Ent. 

 Rev. 44 (4): 508-515. — Quezada, DeBach and Rosen, 1973. Hilgardia 41 (18): 543-604. 

 -Subba Rao, 1974. Bui. Ent. Res. 64 (4): 525-531. 

 ater Haliday. Md. Ecology: Primary parasite attacking Melanaspis obscura (Comst.). 

 Thysanus ater Haliday, 1840. Ann. Nat. Hist. 4: 234. 



