18 Journal New York Entomological Society. [Voi. xvii. 



Mr. G. P. Weldon recorded a Chalcid and Ichneumonid parasite 

 of this species, but gave no specific determination for either. My 

 friend, Mr. G. M. Hite, had a small Chalcid from the gall of this 

 species this spring. Mr. J. C. Crawford, of the U. S. National Mu- 

 seum, says it is perhaps a new species of the genus Eiirytoma. 



The male is so very much darker and differs in the emargination 

 of the clypeus, and the larger antennal foveae, also the shorter inner 

 tooth of the claws, that if they had not been reared from the same gall 

 I should hesitate to call them the same. This is a good example of di- 

 morphism of which we have so many examples in sawflies. 



At first I took this for C. s. -nodus Walsh, but it may be separated 

 from that species by the following characters : ? , the much lighter 

 color, the thorax being almost entirely rufo-ferruginous ; the middle 

 fovea narrower and deeper ; the antennal joints are longer ; the sheath 

 is more sharply truncate ; the ocellar basin is more sharply defined ; 

 the inner tooth of the claws is shorter ; the stigma is more elongate. 

 cJ*, the antennal fovece much larger ; the ocellar basin much better 

 defined ; the head relatively larger ; the antennse longer, the joints 

 being much longer; the apical antennal joint about the same length 

 as or longer than the preceding one, etc. 



I take great pleasure in naming this after Dr. A. D. MacGillivray, 

 who first told me it was a new species. 



Type in the collection of the author. 



lo. Cryptocampus bebbianas, new species. 



Female. — Length 6 mm. ; length of anterior wing 6 mm. Head not so strongly 

 narrowed toward the occiput as in C. orbitalis Nort. Clypeus subangularly, rather 

 shallowly emarginate ; lobes broad, triangular, obtuse at apex. Antennal fovese 

 large, extending both above and below the antennae. Middle carina stronger than 

 usual. Middle fovea deep, somewhat crescent-shaped, with a short longitudinal 

 fovea in the center, which extends to the frontal crest which is broken by it. Ocellar 

 basin seldom complete, bounded by line-like ridges whigh are always present on the 

 lower part, and sometimes rather strong ; these ridges run to the frontal crest and 

 form it. Interocellar furrow present and usually rather strong, slightly behind the 

 ocelli ; lateral ocellar furrows distinct, usually running to the antennal fovea;. Third 

 and fourth antennal joints equal ; apical joint slightly longer than the preceding, 

 scarcely tapering, obtusely rounded at the apex. Head around the ocelli finely gran- 

 ular. Middle lobe of mesonotum closely punctured, without — or it is only slightly 

 visible — a middle furrow. Mesopleurse highly polished. Claws deeply cleft, inner 

 tooth much shorter than the outer. Venation normal or the lower discal cell of hind 

 wings is a little shorter than the upper. Stigma rounded on the lower margin, broadest 

 near base and gently tapering to the apex. Sheath rather broad, obtusely rounded 

 at the apex, straight on the upper margin or slightly emarginate. Cerci tapering, as 



