826 Hymenoptera in America North of Mexico 



Taxonomy: Girault, 1924. Insecutor Inscitiae Menstruus 12: 174 (syn. of bouckeamis 

 Ratzeburg). — Gahan, 1938. Ent. Soc. Wash., Proc. 40: 217 (Girault's syn. incorrect). 



Biology: Glendenning, 1924. Canada Dept. Agr., Pam. (n. s.) 50: 13 (.lipardis). — Schaffner 



and Griswold, 1934. U. S. Dept. Agr, Misc. Pub. 188: 6, 153. — Jaynes and Marucci, 1947. 



Jour. Econ. Ent. 40: 11. -Brunson, 1957. Jour.Econ. Ent. 50: 375. -Allen, 1962. U. S. 



Dept. Agr., Tech. Bui. 1265: 102. -McNay, 1963. Canad. Ins. Pest Rev. 41: 20. 

 klugii (Ratzeburg). Que., Ont., Maine, Mich., Wis., Minn., Man., Sask., Mont., B. C., Wash., Oreg., 

 CaHf.; Europe. Possibly introduced from Europe along with its sawfly hosts; records 

 have not been found. Host: Gilpinia hercyniae (Htg.), Mesoleius tenthredinis Morley, 

 Neodiprion pratti banksianae Roh., N. sertifer (Four.), N. tsugae Midd., Pristiphora 

 erichsonii (Htg.). North American literature about this species before 1939 is mostly 

 under the name neinaticida Packard; type of Packard's species has not been found, but 

 it is most likely a syn of Dibrachys cavus (Walker). 



Pteromalus klugii Ratzeburg, 1844. Ichn. d. Forstins., v. 1, p. 198. 9. 



Biology: Hewitt, 1911. Canad. Ent. 43: 297. —Hewitt, 1912. Canada Dept. Agr., Div. Ent. Bui. 

 5: 28-31. — Swaine, 1912. Ent. Soc. Ont., Ann. Rpt. 43: 87. — Finlayson and Reeks, 1936. 

 Canad. Ent. 68: 163. -Finlayson, 1939 (1938). Ent. Soc. Ont., Ann. Rpt. 69: 34-35. 

 — Furniss and Dowden, 1941. Jour. Econ. Ent. 34: 49-51. —Hopping et al., 1943. Sci. Agr. 

 24 54-61. -Lejeune and Hildahl, 1954. Canad. Ent. 86: 337-344. -Graham, 1956. Forest 

 Sci. 2: 152-153. -Struble, 1957. Forest Sci. 3: 312. -Griffiths, 1959. Canad. Ent. 91: 508. 

 -Schneiderman and Horwitz, 1958. Jour. Expt. Biol. 35: 520-551. -Drooz, 1960. U. S. 

 Dept. Agr., Tech. Bui 1212: 33. -Ohnesorge, 1962. Ztschr. f. Angew. Ent. 49: 142. -Gauss, 

 1964. Ztschr. f. Angew. Ent. 54: 226. 



Morphology: Finlayson, 1963. Canad. Ent. 95: 483, 500 (immature stages). 

 koebelei Gahan. Calif. Possibly a parasite of Caliroa cerasi (L.). 



Tritneptis koebelei Gahan, 1938. Ent. Soc. Wash., Proc. 40: 218. 9, cJ. 

 scutellata (Muesebeck). N. H., Mass., Conn. Host: Apayiteles melanoscelus (Ratz.). 



Coelopisthia scutellata Muesebeck, 1927. Jour. Agr. Res. 34: 331. 9, cJ. 



Biology: Muesebeck and Dohanian, 1927. U. S. Dept. Agr., Bui. 1487: 27. 



Genus DIBRACHYS Foerster 



Revision: Boucek, 1965. Mus. Natl. Pragae, Acta Ent. 11: (Central European fauna). 

 —Graham, 1969. Brit. Mus. (Nat. Hist.) Ent., Bui. Sup. 16: 804-814 (European fauna). 



Genus DIBRACHYS Subgenus ALLODIBRACHYS Boucek 



Dibrachys subg. Allodibrachys Boucek, 1965. Mus. Natl. Pragae, Acta Ent. 11: 30. 

 Type-species: Dibrachys hia7is Boucek. Orig. desig. 



No Nearctic species at present referred to this subgenus. 



Genus DIBRACHYS Subgenus DIBRACHYS Foerster 



Dibrachys Foerster, 1856. Hym. Stud., v. 2, p. 65. No species. 



Type-species: Pteromalus boucheanus Ratzeburg. Desig. by Thomson, 1878. 

 Coelopisthoidea Gahan, 1913. Canad. Ent. 45: 179. 



Type-species: Coleopisthoidea cladiae Gahan. Orig. desig. 



Taxonomy: Graham, 1969. Brit. Mus. (Nat. Hist.) Ent., Bui. Sup. 16: 804 (Ratzeburg 

 described no species of Dibrachys, but fragmentary remains of a specimen in Vienna 

 identified by him as Dibrachys look like a Colotrechnus). 

 cavus (Walker). Newfoundland, Que., N. S., N. B., Maine, s. to Fla., w. to Alaska, B. C. and 

 Calif; worldwide. Ecology: This is the most polyphagous of chalcids; if all known host 

 records are correct, it may be a primary, secondary, or tertiary parasite, attacking many 

 orders of insects, plus spiders. Host: Epeira sp., E.foliata (Fourc), Philodromus 

 aureoius (Oliv.); Forficula auricularia L.; Chrysopa sp., C. califomica Coq., C. lateralis 

 Guer., C. majuscula Banks, C. oculata Say, C. rufilabris Burm., Sympherobius 



