AKT. 20. 



ICHNEUMON-FLIES OF TRIBE PANISCINI — CUSHMAN. 5 



CIDAPHUS BARBARIC A (Morley). 



Tetragonalys barbarica Morley, Rev. Ichn. Brit. Mus., vol. 2, 1913, p. 132; 

 Fauna Brit. Ind., Hym., vol. 3, Ichn., pt. 1, 1913, p. 360, fig. 101. 

 The North American species of this genus may be separated by 

 the following key : 



KEY TO THE NORTH AMERICAN SPECIES OF CIDAPHUS. 



1 First tergite not laterally grooved to near base, glymmae short, oblique, closer to 



spiracles than to base paniscoides Ashmead 



First tergite grooved laterally to near base, glymmae long, parallel to upper and 

 lower surfaces of tergite, midway between spiracles and base - 2. 



2 Areolet twice as long as broad; antennae pale ferruginous with extreme apex 



infuscate occidentalis, new species. 



Areolet less"Than twice as long as broad; subapical fourth of antennae blackish, 

 extreme apex pale australis, new species. 



CIDAPHUS PANISCOIDES (Ashmead). 



Plesiophthalmus paniscoides Ashmead, Ent. News, vol. 3, 1892, p. 107. 

 Plesiophthalmidea paniscoides Viereck, Bull. 83, U. S. Nat. Mus., 1914, p. 119. 

 In addition to the type male which is from Massachusetts, there 

 are in the national collection males from Bartlett, New Hampshire; 



Fig. 2.— FIRST ABDOMINAL SEGMENT OF CIDAPHUS: 0. PANISCOIDES; b. OCCIDENTALIS. 



New York, and Pennsylvania; and a female from Plummer Island, 

 Maryland;' the last captured by H. L. Viereck on August 9, 1912. 



CIDAPHUS OCCIDENTALIS, new species. 



Very distinct from paniscoides (Ashmead) in the formation of the 

 first tergite. 



Female. — Length 13 mm. 



Head punctate, rather coarsely and very densely so on face ; clypeus 

 broadly rounded at apex, medially impressed, coarsely and sparsely 

 punctate; frons laterally transversely striate; ocelli separated from 

 the eyes by a narrow but distinct space, postocellar line distinctly 

 more than half the diameter of an ocellus. Thorax shining, very 

 faintly coriaceous; notauli very faintly impressed; nervulus antef ur- 

 eal and slightly reclivous; nervellus distinctly curved above break; 

 areolet twice as long as wide; propodeum completely areolated, but 

 with costulae and apical abscissae of median carinae weak, areola 

 small, practically pentagonal, distinctly longer than broad. Abdomen 

 slender, compressed from beyond third segment, shining; first seg- 

 ment decurved, spiracles distinctly beyond middle, petiole grooved 

 laterally nearly to base, the groove vertically rugose basally, glymmae 

 midway between spiracles and base, long, parallel to upper and lower 

 surfaces of petiole; ovipositor sheath nearly as long as third tergite. 



