EMBIOPTEEA OF THE WEW WO'RLD ROSS 445 



Remarks. — This species is named after the collector, Dr. Edward 

 McC. Callan, of St. Augustine, Trinidad, who sent the writer much 

 valuable material for this study. 



The cleavage of the tenth tergite of this species is very remarkable ; 

 the right fork is apparently an extension of the notch that appears 

 along the inner margin of the right hemitergite in other species of 

 Schizembia and in the genus Chelicerca. 



Genus ANISEMBIA Krauss 



AnisemMa Kbauss, 1911, p. 74. — Endeelein, 1912, p. 109 ( = Oligotoma and 

 fl'apZoe?>;&;a).— CHAifBERLAiN, 1923, p. 346. — DA\^s, 1940cl, p. 531.— Ross, 

 1940b, p. 649. 



Genotype. — Embia texana Melander, by original designation. 



Distribution. — Cuba, south-central United States, and Baja Cali- 

 fornia, Mexico. 



At this time the writer is limiting this genus to the three species 

 treated below. Species of the subgenera Chelicerca Koss and Dacty- 

 locerca Ross, which are much more complex, have been removed as 

 they appear to be derived from a different stock. This is evidenced 

 by the discovery of a new species of the same series that has a two-seg- 

 mented left cercus. It is thus likely that the one-segmented left cercus 

 has appeared twice within the family on different evolutionary lines. 

 AnisemMa was probably derived from M esemhia-like ancestors. 



The genus Anisenibia Krauss is here restricted to include only those 

 species having an apically pointed occipital foramen ; a one-segmented 

 left cercus ; a simple, incomplete tenth tergal cleft ; a simple left tergal 

 process (10 LP) ; a short, unmodified process of the hypandrium 

 (HP) ; and the basal segment of the right cercus cylindrical, with a 

 simple, circular basal foramen. 



KEY TO SUBGENERA AND SPECIES OF ANISEMBIA (MALES) 



1. Inner nodule of left cercus small, very sparsely echinulate; head scarcely 



larger than terminalia (Aniseinbia, s. str.) 2 



Inner nodule of left cercus large, rounded, very densely echinulate; head 

 distinctly larger than terminalia ; Baja California, Mexico 



A. (Bulbocerca) sini 



2. Process of left hemitergite rather short, extending straiglit caudad ; process 



of right hemitergite tapered ; medium sized ; United States 



A. (Aniseinbia) texana 



Process of left hemitergite very long, strongly curved toward left ; process of 



right hemitergite truncate ; small-sized ; Cuba A. (Anisembia) venosa 



Subgenus Anisembia, sensu stricto 



ANISEMBIA (ANISEMBIA) TEXANA (Melander) 



Embia texana Melandee, 1902, p. 19, figs. 2, 3 ; 1903, p. 99, figs. 1, 2.— B^riedekichs, 



1906, p. 238. 

 AnisemUa texana (Melander) Krauss, 1911, p. 74, fig. F.— Chamberuk, 1923, p. 



345.— Davis, 1940d, p. 532. — Sanderson, 1941, p. 60 (record). 



