245 



insect pests. Many species, representing many genera, are common on 

 cotton, the liabits of only a few of wliicli are yet known. Below I give 

 a list of those taken by me in Mississippi, describing such of them as 

 were reared Irom cotton insects, in order to complete, as far as possible, 

 the life histories of these insects. 



The clear-winged perilampid {Perilampus hyalinus Say). One small 

 specimen of this species, measuring only 2""" in length, was bred August 

 17, 1893, from the cocoon of Chrysopa a^/eMWo/« Walk. Others were 

 seen flying about cotton plants. The species has also been bred from 

 lepidopterous impae. 



Four species belonging to the EurytorainaB were captured on cotton : 

 Eurytoma sp. $ ; Eurytoma sp. $ ; Bruchop'hayus sp. 6 ; and Isosoma 

 sp. S . All, except the last, are true parasites, and their hosts will 

 probably be found to occur on cotton. 



The ovate Chalcis {Chalcis ovata Say) was not unfrequently met with 

 on cotton. It is parasitic on various lepidopterous larva and aids 

 materially in destroying the cotton worm [Aletia xylina), from which it 

 has been often bred. 



Antigaster mirahiUs Walsh was captured in the act of ovipositing in 

 the eggs of Q^canthus fasciatus Fitch, a new host for it, while two dis- 

 tinct species belonging to the genus Eupelmus were taken running 

 over cotton leaves. 



The pleasure I have in announcing the discovery of a new genus in 

 the subfamily Encyrtinse is somewhat marred from the fact that the 

 sj^ecies is parasitic on one of the most beneficial insects we have — a 

 chrysopa-fly. It was reared from Chrysopa cocoons on cotton, and for 

 which I propose the name Chrysopophagus. 



The genus may be readily recognized by the following brief diagnosis : 



Chrysopophagus gen. nov. 



General habitus of Chiloneuriis Westw., the mesonotum with silvery white hairs. 

 Female. — Head, viewed from iu front, oblong, the eyes obloug-oval, bare, convergent 

 above, the vertex narrowed, the lateral ocelli touching the border of eye, anteuual 

 furrows short but distinct; mandibles ( ?) bideutate; maxillary palpi 3-jointed, the 

 first joint short, the last longer than the first two united; labial palpi 2-jointed; 

 antenn;e 11-jointed, the liagellum compressed and much enlarged toward apex, the 

 pedicel shorter than the first funiclar joint, the joints after the third funiclar joint 

 wider than long. Thorax ovoid, the pronotum lunate, the mesonotum transverse, 

 twice as wide as long, plumbeoiis with silv-ery white hair; the scutellum triangular, 

 with a tuft of erect black bristles at tip ; the axilla; wedge-shaped, their points meet- 

 ing at base of scutellum; wings with the marginal vein A^ery long, fully twice as 

 long as the stigmal vein, or a little longer; the postmarginal slightly shorter than 

 stigmal. Abdomen conic-ovate, with seven distinct segments, the ovipositor only 

 slightly exposed. 



Male. — Differs from 9 in having the eyes only slightly convergent above; the 

 pedicel only about one-third the length of the first flagellar joint; the joints of the 

 flagellum long, cylindrical, contracted at juncture, with long hairs irregularly 

 arranged and not in half whorls as in Chilonenrus, while the scutellum is bare with- 

 out a tuft of long black bristles. 



8359— :NTo 3 3 



