146 J^OURNAL,. BOMBAY NATURAL HISTORY SOCIETY, 1892. 



forwards ; in small specimens [i.e., in those named atrisparsa and 

 kttescens) there is- a faint sulcus running parallel with, the anterior 

 border and Just behind it ; in larger forms this sulcus becomes 

 obsolete. 



Anal fergite near the middle of its hin&r half more thickly punc- 

 tured than the others ; the ridge on its inner surface represented by 

 an anterior longer and a posterior shorter black portion ; the notch 

 absent or scarcely visible. 



6 . Anal tergite roundedl. 



Forceps. — 1st pair with immovable dact^rlus short and upcurled ; 

 movable dactylus with a basal external rounded projection, a com- 

 pressed distal half, and a distinct more or less-rounded tooth projecting 

 inwardly to meet the immovable dactylus. 



2nd pair : —The two dactyli about equal in. length ; the immovable 

 blade-like,, not attenuated towards distal end,, with a nearly straight 

 denticulate inner edge, outer edge proximally nearly straight,, dis- 

 tally exceedingly convex, the movable dactylus hollowed internally, 

 and with hinder edge denticulate, much thicker at base than, at 

 apex, with gently convex outer border and concave inner border. 



$ . Anal tergite resembling that of the male. 



Vulva formed on the same plan as- in Z. hrandti, and. not differing 

 from it in any important particulars.. 



Length 18-35 mm. 



This species closely resembles Z,. mermis, Humbert, in the form of 

 the head, nuchal plate, and 1st tergite, but differs in the form of the 

 eopulatory forceps, in the presence of the ridge on the anal tergite, 

 in colour, and in sculpture. 



I cannot separate Z. lutescens from Z. heterosticatica by any character 

 which I consider specific. There are certainly no black spots on the 

 two specimens of the former species, which served as Mr. Butler's 

 types, and there is a sulcus on the first tergite. Nevertheless both 

 these characters are variable, inasmuch as in one specimen of 

 Z. heterosticatica, the spots are few in number and the sulcus is feebly 

 indicated. 



The type of Z. atrisparsa differs from lutescens and resembles 

 heterosticatica in being, as the name indicates, spotted with black ; and 

 it closely resembles lutescens in having the first tergite sulcate. 



