ART. 25 NEW ICHNEUMON-FLIES — CUSHMAN 5 



Type locality. — Burt Lake, mouth of Maple River, Mich. 



Host. — Gyrirviis species (cocoon). 



Type.— Cd^t No. 41992, U.S.N.M. 



Two females and three males reared by H. B. Hungerford, July 

 23-26, 1927. 



This is the third ichneumonid parasite recorded from Gyrinus. 

 The others are the European Hetniteles argentatus Gravenhorst 

 {=Hemiteles gyrini Parfitt) and the American Gausocentrus gynni 

 Ashmead. The first is unknown to me but is amply distinct from 

 hu7igerfordi in color and sculpture. The second, Davis has already 

 indicated, belongs to the Hemitelini, though he assigned it to no 

 genus. It is congeneric with liungerfordi., though amply distinct 

 specifically. In Heviiteles Gravenhorst it is preoccupied by gyrini 

 Parfitt. A new name is assigned to it below. 



HEMITELES GYRINOPHAGUS. new name 



Gausocentrus gyrini Ashmead, Can. Ent., 1894, p. 25 (uot Eemiteles gyrini 



Parfitt). 

 {Gausocentrus) Hemitelini gyrini Davis, Trans. Amev. Ent. Soc, vol. 24, 



1897, p. 342. 



Genus MACROGROTEA Brethes 



Macrogrotea Brethes, Rev. Chilena de Hist. Nat., vol. 20, 1916, p. 84. 

 Type. — PimpJa gayi Spinola. 

 Lahcnidea Rohwee, Proc. U. S. Nat. Mus., vol. 57, 1920, p. 413. Type.— 

 (Grota swperha Schmiecleknecht) =J/(fc/-of/ro^ea gayi (Spinola), accord- 

 ing to Brethes (new synonymy). 



METACOELUS CAVICOLA, new species 



A typical Metacoelus Foerster with no apparent modification to 

 adapt it for cave life unless the white ocelli be such. 



In general form and structure it is very like femoralis (Geoffroy), 

 but it is at once distinguishable by its largely black hind coxae and 

 femora. 



Female. — Length 7 mm. 



Head in profile nearly equilaterally triangular, the combined face 

 and clypeus moderately convex, protrusion of upper margin of face 

 comprising about one-third total thickness of head ; face densely punc- 

 tate, clypeus more sparsely so; frons minutely opaquely punctuate, 

 medially slightly elevated ; diameter of lateral ocellus barely as long 

 as ocell-ocular line; malar space fully twice basal width of mandible; 

 antennae as long as combined length of head, thorax and first abdomi- 

 nal segment; flagellum tapering from base to apex, the apical joint 

 less than half as thick as the basal; first joint nearly two-thirds as 

 thick at apex as long, second and following joints transverse, middle 



