Mar., 1909-] ROHWER : CRYTOCAMPUS IN BOREAL NORTH AMERICA. 21 



Enura salicicola Marlett, Tech. Ser. 3, U. S. Dept. Ag., p. 20, 1896. 



Cryptocanipus salicicola Konow, Genera Insectorum, 1905, p. 51. 



Female. — Length 5-7 mm. Head seen from the side not abruptly narrowed 

 above, evenly rounded in front. Clypeus deeply, circularly emarginate ; lobes narrow, 

 pointed. Middle carina not noticeable. Middle fovea very shallow, elongate, open 

 at the top. Antennal fovese not at all strong, almost wanting. Ocellar basin very 

 small and shallow, sometimes hardly present. Frontal crest low, unbroken. Inter- 

 ocellar furrow faint ; lateral ocellar furrows narrow, deep, distinct, visible from near 

 occiput to antennal fovese. Antennee rather slender ; third joint slightly exceeding 

 the fourth ; apical joint tapering, as long as or slightly longer than the precedmg 

 one. Head and thorax finely punctured. Mesopleur?e highly polished, very finely 

 denticulated Claws minutely cleft. Venation normal ; stigma evenly rounded on 

 the lower margin ; if anywhere it is broader at the base. Sheath not very broad, 

 straight above, rounded at apex, almost parallel-sided ; hairs rather long. Cerci 

 long, tapering. Black : labrum, mandibles, tegul?e ; angles of pronotum and antennae 

 brownish. Legs below middle of femora and the trochanters somewhat, brownish- 

 ferruginous. Wings dusky hyaline ; venation light brown, base of stigma pale. 



Male. — I have not seen the male but Smith described it as follows : " Smaller ; 

 head with eyes larger; abdomen nearly black; posterior legs with the femora testa- 

 ceous throughout, tarsi darker than in the ? ; wings with veins more deeply marked, 

 as also the stigma. Average length 6 mm." 



Habitat.— V^oxxd., 111. (E. A. Smith). 



I regret I am unable to get the original description as it contains 

 a description of the gall and larva. The gall is on Salix aiba.^ 

 Eurytoma studiosa Say is parasitic on this species. 



The above description of the female was drawn up from two 

 specimens received from the U. S. National Museum. They are 

 darker in parts than Smith's specimens but are undoubtedly the same. 

 She describes the legs as follows : - Coxee, trochanters and basal half 

 of femora testaceous, the remaining portions much paler." 



12. Cryptocampus niger (Provancher). 



Enura nigra Prov., Addit. Faun. Can. Hym., p. 346, 1888. 



Cryptocampus niger Dalla Torre, Cat. Hym. , i, p. 277 , 1889. 



Enura nigra Marl., Tech. Ser. 3, U. S. Dept. Ag., p. 20. 



Cryptocampus niger Knw., Genera Insectorum, p. 51, I905- 



Female. - Length 4.5 mm. ; length of anterior wing 4-5 mm. Head narrow, 

 not strongly rounded out in front. Clypeus rather narrowly, subangularly emargi- 

 nate • lobes broad, rounded at the apex. Superclypeal area on each side depressed 

 Antennal fove^ inconspicuous. Middle fovea almost wanting, indicated by a narrow 

 line Ocellar basin bounded by rather low walls, the height of which seems to vary 

 in different specimens. Frontal crest low^jlighU y broken in the middle. Inter- 



,^^r^7^^^^1s^:7hi^r^d;Kedlpeci^ ' Is it possible that this may be one of the 

 European Cryptocampi, or is it an American form that has taken to this introduced 

 willow ? 



