48 



BULLETIiSr 416^ U. S. DEPARTMENT OF AGEICULTURE. 



Dttring 1914 chrysopids were particularly abundant. They were 

 in fact the most common predatory species. The ''stalked" eggs 

 were everywhere in evidence and the adults, which are nocturnal, 

 rose in swarms from under the fohage as one brushed through the 

 cotton rows. 



Ohrysopa quadripunctata Burm. — This species is also fairly com- 

 mon in the Southeast. It is most noticeable during July and August, 

 and its larva doubtless contributes to the predatory work of Ohrysopa 

 rufildbris. 



CJirysopa oculata Say. — ^Adults of tliis lacewing fly (fig. 12) have 

 been reared from larvae actively feeding on red spiders. It is not 

 particularly common in South Carohna, however, and as a red 

 spider enemy probably is not of primary importance. 



GJirysopa nigricornis Burm. — This species has been reared on a few 



occasions from larvae col- 

 lected on cotton infested 

 withred spiders. Its status 

 is probably about the same 

 as that of C oculata. 



DIPTERA. 



Itonididae. 



Fig. Vi.—Art'hrocnodaT Carolina, a predacious enemy of the red 

 spider. At left, mature predacious lar\'a, magnified 60 times; 

 at right, adult female, greatly enlarged. (McGregor.) 



ArtJirocnodax Carolina 

 Felt.— This midge (fig. 13, 

 at right) was recognized, 

 early in the investigation, 

 as one of the most impor- 

 tant enemies of the red spi- 

 der, at times ranking first. 

 Its attack is almost en- 

 tirely confined to the eggs of the red spider, but an occasional mite is 

 destroyed. The earhest seasonal record of occurrence is April 30, 1914. 

 It is first seen usually about the early part of May and becomes abun- 

 dant during the middle of May. Tliis species does not usually reach its 

 highest development until August, although a large amount of con- 

 trol work is evident during July. Arthrocnodax is always to be seen 

 during September, sometimes commonly in large mite colonies, but 

 becomes rare in October, during wliich month usually only pupae 

 can be seen. Tliis important predator has been collected in mite 

 colonies at Chase City and Emporia, Va. ; Charlotte, Wilmington, 

 Laurinburg, and Buies, N. C; Allendale, Anderson, Batesburg, 

 Brownsville, John's Island, Leesville, St. Matthews, and other 

 points in South Carohna; Macon and Savannah, Ga. ; Orlando, Fla. ; 

 Girard, Albertville, and Boaz, Ala. ; and Tallulah and Mound, La. 



