HYMENOPTEROUS PARASITES. 1893 



Tetrastichus semideae (Packard). 



Hulophus semideae Packard. 



Male, female.- — Antennae inserted slightly above clypeus. Mesoscutnin Tvith an 

 impressed, median, longitudinal line. Mesocutellum with two parallel, impressed, lon- 

 gitudinal lines. Flagellum of male antennae with many long appressed hairs. Abdo- 

 men of female a little longer than thorax and about as broad, rounding out to joint 3 

 which is broadest, and thence, with straight sides, tapering to iin acute point; the 

 whole abdomen flattened and usually tilted upwards. Abdomen of male shorter and 

 narrower than thorax, flattened and sub-oval. General color bluish green ; antennae 

 brown, darker in male than in female; all tibiae and tarsi honey-yellow; all coxae dark 

 brown, yellowish at tips; front femora dark metallic except at tips ; middle and hind 

 femora dark brown except at tips. Length, 1.85 mm. ; expanse, 3 mm. 



This species has been reared in considerable number, from Oeneis semi- 

 dea by jNIr. Scudder who has sent me a goodly series. 



Tetrastichus saundersii (Packard). 



Eiilophus saundersii Packard. 



Of this species of Dr. Packard's there remain but three greatly mutilated specimens • 

 The antennae of all are gone and all are pinned with large pins through the thorax so as 

 to destroy the characters. The species from the wings does not belong to the Eulo- 

 phlnae but to the Tetrastichinae, and may provisionally to be placed in Tetrastichus. 

 There is no hope of a proper placing of this species until it is reared once more. The 

 best we can do is to reproduce Dr. Packard's original description : 



Three females. A minute species compared with semideae, but otherwise closely 

 allied to it in structure and color; the abdomen, however, is considerably shorter and 

 thicker, being scarcely longer than the thorax, while in semideae it is as long as head 

 and thorax together. Antennae of the same form as in semideae but much shorter, 

 the joints between the second and the club being longer than broad, while in semideae 

 hey are twice as long as thick ; they are brown and hairy. Wings much as in semideae, 

 but the veins are much paler, less distinct. Legs colored much as in semideae. Tro- 

 chanters brown, femora brown, pale at base, and whitish at tip ; tibiae and tarsi white, 

 except tarsal joints which are pale brown. Abdomen, like the rest of the body, deep 

 blue with a greenish tinge, much shorter than in semideae and conical ovate, the tip 

 not being at all produced. The body is smooth with very fine hairs. Length, 1 mm. 



These specimens were reared by. Mr. Saunders in Ontario from a chrysalis 

 of a Thecla presumed to be edwardsii . 



Tetrastichus theclae (Packard). PI. 89, fig. 6. 



Eulophus theclae Packard. 



Male. — Antennae inserted considerably above clypeus. Mesoscutum with median 

 longitudinal sulcus. Mesocutellum with two distinct, parallel, longitudinal sulci. 

 Submarginal vein with two bristles. Antennal scape not reaching to the eyes. Abdo- 

 men broadly ovate, as long as thorax but considerably broader. General color very 

 dark metallic blue-black ; antennae brown with whitish pile ; legs with all femora and 

 coxae blue-black; all tibiae and tarsi yellowish white; last tarsal joint dusky. Length, 

 1.28 mm. ; expanse, 3 mm. 



Of this species I have seen 12 males all reared from chrysalis of Thecla 

 calanus, presumably by Mr. Scudder. 



