208 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



1, '97. Koebele." Another slide bearing a pair together with 

 Jlavopalliata and townsendi and several aphelinines labeled "1768. 

 Aspidiotus on Hibiscus. Cuaiitla, Morelos, Mex., May 29, '97. 

 Koebelc." 



Habitat. — Mexico (San Luis; Cuautla, Morelos). United States — 

 California. 



Hosts. — Aspidiotus Jiederx Vail (Mexico) ; Aspidiotus sp. on common 

 wild shrub (California and Mexico) ; Aspidiotus sp. on Ciruela and 

 Hibiscus (Mexico). 



Type. — The single female as indicated above. 



Homotypes. — Accession No. 45092, Illinois State Laboratory of 

 Natural History, Urbana, 1 male, 7 females (Cuautla, Mexico) on 

 one slide with homotype female oijiavella. 



9. SIGNIPHORA RmZOCOCCI Ashmead. 



Signiphora rhizococci Ashmead, 1900, pp. 409, 411; 1904, p. 497. 



This species was described 11 years ago by Ashmead exactly as 

 follows : 



Female. — -Length, about 0.50 mm. Head anteriorly, a broad band on thorax 

 between the wings and the sutures between abdominal segments, more or less, ivory- 

 white; club of antennae and vertex faintly dusky; anterior orbits narrowly, rest of body 

 and a broad band in middle of front wings, dark brown. 



Ty-pe.—G&t. No. 4858, U.S.N.M. 



Habitat.— Bx2iZ\\: Minas Geras. 



Host. — Rhynch.: Rhizococcus S]). on a composite plant. Bred by F. Noack, July, 

 1897. One specimen." 



I have studied only the type of this species, probably a male 

 mounted on a slide labeled "7902°.^ Par: on Rhizococcus on com- 

 posite plant from F. Noack, Bella Horizonte, Minas Geras, Brazil, 

 July, 1897. Signiphora sp. rhizococci Ashm. Type 4858." The 

 caudal half of the abdomen is missing. 



The species appears to be a well-marked one and should be easily 

 recognized; nevertheless, it is fortunate that its principal struc- 

 tural characteristics can be pointed out. Nothing is known of it 

 excepting what is given with its original description. The follow- 

 mg structural characteristics : Like Jlavopalliata excepting as pointed 

 out later in the table of species. The mandibles are bidentate and 

 black at tip ; antennae normal. 



10. SIGNIPHORA ALEYRODIS Ashmead. 



Signiphora aleyrodis Ashmead, 1900, pp. 409, 412. 



This species was described at the same time as most of the others: 



Female. — Length, about 0.50 mm. Body mostly golden-yellow; vertex of head 

 faintly dusky; thorax anteriorly and very narrowly, and a band across base of abdomen 



1 The host has since been detennined as Eriococcus braziliensis Cockerell. — J. C. Crawford. 



