54 Hymenoptera in America North of Mexico 



Genus HEMICHROA Subgenus VARNA Ross 



Hemichroa subg. Varna Ross, 1937. 111. Biol. Monog. 15(2): 79. 

 Type-species: Nematus militaris Cresson. Orig. desig. 

 amelanchieridis (Rohwer). Maine, Que. to N. Y.; Alta. to Colo. w. to B. C, Oreg. Host: 

 Amelanchier. 

 Pteronidea amelanchieridis Rohwer, 1920. U. S. Natl. Mus., Proc. 57: 215. 9. 

 militaris (Cresson). Ont. to Alaska s. to R. I., Pa., 111., Mont., Nev. Ecology: Widespread. Host: 

 Pnmus, Amelanchier. 

 Nematus militaris Cresson, 1880. Amer. Ent. Soc, Trans. 8: 7. 9. 

 Nematus thoracicus Harrington, 1893. Canad. Ent. 21: 58. 9. 



Genus CRATEROCERCUS Rohwer 



Craterocercus Rohwer, 1911. U. S. Natl. Mus., Proc. 41: 385. 



Type-species: Hemichroa phytophagica Dyar. Orig. desig. 



Larvae of this exclusively North American genus feed on Quercus. 



Revision: Rohwer, 1918. Ent. Soc. Wash., Proc. 20: 162-165. —Smith, 1969. Ent. Soc. Wash., 

 Proc. 71: 153-161. 

 albipes (Cresson). Oreg., Nev., Calif. Ecology: Adults collected from Quercus. 

 Mesoneura albipes Cresson, 1880. Amer. Ent. Soc, Trans. 8: 11. 9. 

 Craterocercus califoniicus Rohwer, 1917. U. S. Natl. Mus., Proc. 53: 234. 9. 



cordleyi MacGillivray. Oreg., Calif. 



Craterocercus cordleyi MacGillivray, 1923. 111. Univ. Bui. 20(50): 9. 9. 

 fraternalis (Norton). N. H. to Pa. w. to Wis., Ill, Kans., Tex. Host: Quercus alba. 



Hemichroa fratenialis Norton, 1872. Amer. Ent. Soc, Trans. 4: 81. 6. 



Craterocercus quercivorus Rohwer, 1918. Ent. Soc. Wash., Proc. 20: 164. 9,6. 



Craterocercus cervinus MacGillivray, 1923. 111. Univ. Bui. 20(50): 9. 9. 



Craterocercus circulus MacGillivray, 1923. 111. Univ. Bui. 20(50): 9. 9. 



furcatus Smith. Conn., N. J., 111. 



Craterocercus furcatus Smith, 1969. Ent. Soc. Wash., Proc. 71: 160. 9. 

 obtusus (Klug). Conn, to Fla. w. to III., Kans., Ark., Tex. Host: Quercus alba, Q. coccinea. 



Tenthredo {Allaiitus) obtusa Klug, 1814. Mag. Gesell. Naturf. Freunde Berlin 8: 55. 9. 



Hemichroa albidovariata Norton, 1872. Amer. Ent. Soc, Trans. 4: 81. 9. 



Hemichroa phytophagica Dyar, 1898. N. Y. Ent. Soc, Jour. 6: 125. 9, larva. 



Craterocercus floridanus Rohwer, 1912. U. S. Natl. Mus., Proc 43: 238. 9, cJ. 



Genus PLATYCAMPUS Schiodte 



Leptopus Hartig, 1837. Fam. Blattwespen und Holzwespen, nebst Einleitung Naturgesch. 

 Hym., p. 184. Preocc. by Mayer, 1835. 



Type-species: Nematus (Leptopus) hypogastricus Hartig. Monotypic 

 Platycamptis Schiodte, 1839. Mag. Zool. (ser. 2) 1: 20, footnote; pi. 6-10. N. name for 



Leptopus Hartig. 

 Erasminus Gistel, 1848. Naturgesch. Thierr. f. hoh SchuL, p. 9. N. name for Leptopus 



Hartig. 

 Camponiscus Newman, 1869. Entomologist 4: 215. 



Type-species: Camponiscus healaei Newman. Monotypic. 



A small holarctic genus with two North American representatives. 



albostigmus (Rohwer). N. S., Maine to Alaska s. to N. Y., Mich., Minn., Colo., Nev., Wash. 

 Ecology: Widespread. 

 Camponiscus albostigmus Rohwer, 1908. N. Y. Ent. Soc, Jour. 16: 105. 9. 

 americanus (Marlatt). Que., Maine to Alaska s. to Pa., N. Mex., Idaho. Ecology: Widespread. 

 Host: Populus. 

 Camponiscus americanus Marlatt, 1896. Canad. Ent. 28: 251. 9, cJ. 

 Camponiscus smithi Rohwer, 1908. N. Y. Ent. Soc, Jour. 16: 105. 9. 

 Platycampus vierecki MacGillivray, 1920. Canad. Ent. 52: 60. 9. 



