352 Hymenoptera in America North of Mexico 



Genus NEOXORIDES Clement 



Neoxorides Clement, 1938. Festschr. Embrik Strand, v. 4, p. 517. 

 Type-species; Xorides nitens Gravenhorst. Orig. desig. 

 Members of this genus are parasites of wood-boring Coleoptera, and are often collected on 

 trunks of dead trees. 

 borealis (Cresson). Southern Man. s. to Colo, and Ariz., w. to s. B. C. and Calif. Host: 



Melanophila dnimmondi (kby.), Tetropium velutinum LeC, Hylotrupes bajulus (L.). 

 The holotype of this species is recorded from "Hudson Bay Territory". N. borealis is 

 closely related to the European N. collaris (Gravenhorst), and may prove only to be a 

 subspecies of it. 

 Xorides borealis Cresson, 1870. Amer. Ent. Soc, Trans. 3: 167. 9. 

 Xorides occidentalis Cresson, 1879 (1878). Acad. Nat. Sci. Phila., Proc. 30: 380. 9. 

 caryae (Harrington). Que. s. to N. C, w. to Mich. Host: Saperda discoidea F. 

 Xorides caryae Harrington, 1891. Canad. Ent. 23: 132. <J, 9. 



Biology: Harrington, 1891. Canad. Ent. 23: 132. — Blackman and Stage, 1924. N. Y. State Col. 

 Forestry, Syracuse Univ., Tech. Pub. 17: 182. 

 pilulus Townes. N. B. s. to N. C, w. to n. N. W. T., Yukon, Oreg., and Colo. Ecology: This 

 species appears to be a parasite of wood borers in both hardwoods and conifers. It is 

 anomalous in being the widest ranging, yet least collected, of the Nearctic spp. of 

 Neoxorides. 

 Neoxorides pilulus Townes, 1960. In Townes and Townes, U. S. Natl. Mus. Bui. 216 (pt. 2): 

 390. 6, 9. 



Tribe RHYSSINI 



The North American members of this tribe are all parasites of Siricoidea. 



Revision: Rohwer, 1920. U. S. Natl. MUS., Proc. 57: 418-428. 



Genus RHYSSA Gravenhorst 



Rhyssa Gravenhorst, 1829. Ichn. Europaea, v. 3, p. 260. 



Type-species: Ichneximon persuasorius Linnaeus. Desig. by Westwood, 1840. 

 Cryptocentrum Kirby, 1837. In Richardson, Swainson, and Kirby, Fauna Bor. Amer., v. 4, 

 p. 260. 



Type-species: Cryptocentrum lineolatum Kirby. Monotypic. 

 Pararhyssa Walsh, 1873. Acad. Sci. St. Louis, Trans. 3: 109. 



Type-species: Rhyssa persuasoria (Linnaeus). Desig. by Viereck, 1914. 

 alaskensis Ashmead. Alta. s. to N. Mex., w. to s. Alaska and Calif. 



Rhyssa alaskensis Ashmead, 1902. Wash. Acad. Sci., Proc. 4: 199. 9 . 

 Rhyssa skinneri Viereck, 1903. In Skinner, Amer. Ent. Soc, Trans. 29: 87. 9 . 

 crevieri (Provancher). N. S. s. to N. C, w. to Minn. Host: Urocerus albicomis (F.). It remains 

 to be proven that crevieri is distinct from lineolata (Kirby). 

 Epirhyssa Crevieri Provancher, 1880. Nat. Canad. 12: 17. S. 

 hoferi Rohwer. Colo., N. Mex., Ariz. Ecology: It appears that this species occurs in the lower 

 reaches of forests of Pinus ponderosa and in the pinyon-juniper forest type. Males 

 which are predominantly black with yellow markings (as opposed to red with yellow 

 markings) have been collected since the species was treated in the revision of Townes 

 and Townes (1960). Presumably, females with predominantly black ground color will also 

 be found. 

 Rhyssa hoferi Rohwer, 1920. U. S. Natl. Mus., Proc. 57: 421. 9. 

 howdenorum Townes. Md., Va., N. C, Ga., ala., Nebr. Ecology: This species parasitizes siricids 

 boring in Pinus spp. 

 Rhyssa howdenorum Townes, 1960. In Townes and Townes, U. S. Natl. Mus. Bui. 216 (pt. 

 2): 398. 6,9. 

 lineolata (Kirby). N. S. s. to Ga., w. to B. C. and Oreg.; New Zealand, Australia. Host: 



Urocerus albicomis (F.), U. gigas flavicomis (¥.), Sirex cyaneus F., S. edwardsii BruUe, 



