No. 2317. FIVE TRlBEki OF ICHNEUMONINAE—ROHWER. 465 



PHYTODIETUS BURGESSI (Cresson). 



Tryphon burgetisii Ch^sson , Trans. Amer. Ent. Soc, vol. 2, 1868, p. 105. 

 Phytodietus f burgessii Davis, Trana. Amer. Ent. Soc, vol. 24, 1897, p. .347 



Type.— C&t. No. 1508, Acad. Nat. Sci. Philadelphia. 



Female. — Length, about 7 mm. ; ovipositor about 3.5 mm. Slender; 

 inner margins of the eyes parallel; ocelli prominent; postocellar line 

 about one-fourth longer than ocellocular line; anterior basitarsi fuUj 

 two-thirds as long as their tibiae; second and third tergites subequal 

 in length; longer calcarium of hind tibia about half as long as hind basi- 

 tarsus; ovipositor somewhat shorter than abdomen. Black; palpi, 

 mandibles, elongate spots on inner superior orbits, cuneiform spots on 

 anterior margin of scutum, tegulae, spot before, sides and apex of 

 scutellum, metascutellum, spot on metanotum behind posterior wing, 

 U-shaped spot on posterior face of propodeum, apical margins of 

 tergites and sternites broadly luteous; sternum, lower part of mesepi- 

 sternum and sides of propodeum rufous; legs rufous; anterior coxae 

 four anterior trochanters, apical joint of posterior trochanters, apex 

 of posterior femora, base and exterior part of posterior tibiae and 

 basal part of two basal joints of hind tarsi whitish; basal joint of hind 

 trochanters, basal and preapical band on hind femur and most of 

 hind tarsus blackish; wings hyaline; venation pale brown. 



Male. — In the male the rufous color of the thorax and anterior legs 

 is largely replaced by yellowish; the face, inner orbits, cheeks, scape 

 and pedicellum beneath and ventral margin of pronotum are luteous. 



This species was originally described from a single male collected in 

 Massachusetts. Specimens m the National Collection came from the 

 followmg localities: "Canada," ''New York," "Pennsylvania," 

 Charter Oak, Pennsylvania (W. S. Fisher) ; Montclair, New Jersey (W. 

 D. Kearfott); Washington, District of Columbia; Trout Lake, Wis- 

 consin (J. J. Davis); and Texas (Belfrage). 



Hosts. — PolycTirosis liriodendrana Kearfott on Liriodendron (re- 

 corded by Riley and Howard under name P. pleuralis Cresson with 

 the host given as Eudemis hotrana Schiff ermuller) ; Exartema myri- 

 canum (reared by Kearfott) ; and a lepidopteran on chastnut (reared 

 by Fisher). 



PHYTODIETUS PLESIA, new spedes. 



This form is closely allied to burgessii (Cresson) but besides the 

 color differences mentioned in the key it differs in the somewhat 

 longer ovipositor and shorter third tergite. 



Female. — ^Length, 8 mm.; length of ovipositor, 4.25 mm. Eyes 

 large, their inner margins slightly closer together slightly below the 

 antennae; face punctured on a granular surface; ocelli prominent; 

 postocellar line one-fourth longer than ocellocular line; anterior 



144382— 20— Proc.N.M.vol.57 30 



