ART. 4. NEW PARASITIC HYMEN OPTERA — GAHAN. 19 



pedicel large, fully twice as long as the first funicle joint and equal 

 to one-third the length of scape; ring-joints minute, number not 

 determinable: funicle four-jointed, the joints all subequal and each 

 slightly broader than long; club 3-jointed, ovate, slightly thicker 

 and a little shorter than the funicle; abdomen elliptical, slightly less 

 than twice as broad as long, narrower than the thorax but no longer ; 

 otherwise agrees with the female. 



Type-locality. — South Bass Island, Ohio. 



Type.— C^t. No. 26182, U.S.N.M. 



Described from twenty-one females and six males mounted on 

 card points, and twenty-four females and five males mounted in 

 balsam on seven slides. This material all received from Miss Mary 

 Auten, of Ohio University, and all reared by her from the egg 

 capsules of the Arachnid, Philodromus cmiadensis., collected on 

 South Bass Island in Lake Erie, during the month of July, 1921. In 

 addition to the type material several hundred of unmounted speci- 

 mens of this species were received from Miss Auten, all obtained 

 from the same source. Six paratypes returned to Ohio University 

 and two presented to the British Museum in London. Remainder 

 of type material as well as a large part of the unmounted material 

 retained in the National Museum. 



TETRASTICHUS BLEPYRI Ashmead. 



Tetrastichus blepyri Ashmead, Can. Ent., vol. 34, 1902, p. 302. 

 Tetrastichus (Tetrasfichodes) detrimcntosus Gahan, Proc. U. S. Nat. Mus., 

 vol. 46, 1913, p. 430. 



Tetrastichus Tjlcpyri Ashmead was originally described from two 

 specimens reared at Rosewell, New Mexico, by T. D. A. Cockerell as 

 a secondary parasite of Phenacoccus cavaUiae Cockerell. Its actual 

 host is said to have been Blepyrus phenacocci Ashmead infesting the 

 scale insect. 



7\ detrwientos^is Gahan, the types of which are also in the national 

 collection, was described from twenty specimens said to have been 

 reared from CoccincUa sangumea at Lakeland, Florida, by G. G. 

 Ainslie. A review of Ainslie's notes shows that Homolotylus termi- 

 nalis (Say) was also present in this rearing under circumstances 

 which make it highly probable that the Homalotylus was the actual 

 host of the Tetrastichus. 



The writer has more recently received two specimens reared at 

 Murray, Utah, August 24, 1913, by P. H. Timberlake from Micro- 

 terys., species infesting Pulinnaria higelovicLe Cockerell; two speci- 

 mens reared from PhysoJtermes insignicola (Crawford) at Santa 

 Maria, California, in April, 1912, by Timberlake ; one specimen from 

 Alhambra, California, reared from Saissetia olcae (Bernard), by 

 Harold Compere; two specimens reared at Arcadia, California, by 



