Lamachus cushmani, Khalaim & Ruíz-Cancino & Coronado-Blanco & Castañeda-Vildуzola, 2019

Khalaim, A. I., Ruíz-Cancino, E., Coronado-Blanco, J. M. & Castañeda-Vildуzola, Á., 2019, First record of the genus Lamachus Förster, 1869 (Hymenoptera: Ctenopelmatinae) from Mexico, with description of two new species, Russian Entomological Journal 28 (2), pp. 169-179 : 172-173

2. Lamachus contortionis Davis, 1897

Lamachus (?) contortionis Davis, 1897: 284 [holotype female (ANSP), USA, District of Columbia].

= Lagarotis diprioni Rohwer, 1915: 217 [holotype female (USNM), USA, Virginia, Falls Church, collected and reared from Diprion lecontei by W. Middleton and S.A. Rohwer; no. 18521, U.S. N.M.].

REFERENCES. Rohwer, 1915: 217 ( Lagarotis diprioni ; description; host); Cresson, 1928: 14 (type in ANSP); Cushman, 1939: 400 ( Lagarotis diprioni (syn.)); Brown, 1941: 5 (host; Canada); Townes, 1945: 519 (catalogue); Townes and Townes, 1951: 335 (catalogue); Carlson, 1979: 596 (catalogue; host).

REMARKS. Townes [1945] in his catalogue of Nearctic Ichneumonidae reported, after Brown [1941], this species as parasitoid of Diprion [ Gilpinia ] hercyniae and Neodiprion abietis . Actually, Brown [1941] records L. contortionis as parasitoid of Gilpinia polytoma (sic!) and N. abietis , without D. [ Gilpinia ] hercyniae .

Carlson [1979] in his catalogue mentioned distribution of this species in USA from Maine south to north Florida, and west to Wisconsin and Arkansas, but with no details .

DISTRIBUTION. Canada, Northeast USA (Pennsylvania, DC, Virginia).

BIOLOGY. Parasitoid of Diprion lecontei (Fitch) [ Rohwer, 1915], Neodiprion abietis (Harris) and Gilpinia polytoma (Hartig) in Canada [ Brown, 1941]. Also reported as parasitoid of Gilpinia hercyniae (Hartig) [ Townes, 1945; Carlson, 1979], N. nanulus Schedl and N. pratti banksianae Rohwer [ Carlson, 1979].