RILEY NOTES ON NORTH AMERICAN MICROGASTERS. 309 



worm, it may be well to compare it with ?Hilitaris. In Ap. 

 militarise which I have bred from Nephelodes violans as well as 

 from the Army-worm, the stigma is not so dark, the radial vein 

 passes into the basal vein of the areolet quite evenly, the base 

 of the abdomen beneath is reddish and the coxae as well as the 

 femora are red, the knees dusky. It more particularly differs from 

 Jlaviconch(E and from other allied species in a character hitherto 

 unrecorded ; the basal joints of the abdomen are quite smooth, 

 and on the second joint two oblique grooves are very distinct. 



Apanteles coNGREGATus (Say). — Under this name* must 

 be grouped a long series of forms attacking various Sphinges, 

 Bombycids and Noctuids, and perhaps other Lepidoptera, But 

 for the present I will mention only those bred in Missouri from 

 Choerocampa paiJ2pi7zatrixe Sphinx ^-ynaculata^ and two un- 

 known species of Sphingid larvae, those bred from Sphinx catalpce 

 from Knoxville, Tenn., those bred from Leucania unipuncta in 

 Missouri in 1869 and in Connecticut in 1880, and those bred from 

 Hemileuca maia and Saturnia Jo in Missouri. The species is 

 characterized by the rough first and second abdominal joints and 

 by the legs, excepting the posterior coxte, being red. The an- 

 tennse vary from black to testaceous, and the abdomen is either 

 -entirely black or is marked with red on some of the joints. The 

 metathorax has an indistinct median line. The radius arises be- 

 yond the middle of the stigma and passes into the basal vein of 

 the areolet with quite an even curve, except in the specimens 

 bred from Saturnia and Hemileuca (to which I would give 

 the variety name hemileucce)^ which have a distinct angle at the 

 point of union. In var. hemileucce^ also, the second abdominal 

 joint is slightly less coarsely sculptured than in specimens bred 

 from Sphinges and Army-worms. This variety agrees with those 

 parasitic on Sphinges in forming clear white cocoons spun sepa- 

 rately upon the back of its host and not enveloped in loose silk. 



Specimens bred from the Army-worm in Missouri in 1869 

 from bunches of cocoons enveloped in dull whitish floss silk have 

 the abdomen entirely black, but from similar bunches of cocoons 

 was bred a form which, while agreeing in sculpture, has more or 

 less of the first, the second and base of the third joints red, the 



* The insect described by Provancher under this name is not Say's species, but is a syno- 

 nym oi gelechicE Riley. 



