100 



REPORT UPON A COLLECTION OF 



Morphological characteristics. Adult female (Fig. 21 A) about 1 mm. 

 long, somewhat elongate, the cephalothorax expanded and somewhat 

 wider than the abdomen, from which it is separated by a constriction. 

 Anterior portion of the cephalothorax tending to be quite heavily chitinized 

 at maturity, the remainder of the body, except for the pygidium, mem- 

 branous. Dorsum with pores only at the margins of the abdominal seg- 

 ments. 



Fig. 21. Pseudodiaspis elaphrii n. sp. : A, adult female; B, pygidium of first stage; 

 C, extremity of microduct ; D, duct ; E, antenna of first stage. 



Pygidium (Fig, 20) relatively large, with two pairs of rather small 

 lobes. Median lobes slightly separated, acute at the apex, with a deep 

 lateral notch and continuous with a conspicuous, club-shaped paraphysis. 

 Between the median and second lobes is a small pore prominence. Second 

 lobes resembling the first in form but slightly smaller, likewise continuous 

 with a club-shaped paraphysis, the paraphyses of both pairs having their 

 inner extremity heavily chitinized and of lunate form. Beyond the second 

 lobes is a spine followed by a gland spine, two pores, a spine, a gland spine, 

 two pores and two widely separated spines. Marginal ducts large, their 

 pores surrounded by chitinous rims ; dorsal ducts much smaller than those 

 of the margin, very few. All the ducts presenting a transversely striate 

 appearance (Fig. 21D). On each side there are three or four pairs of 

 long, slender microducts with the apex of the form shown in Fig. 2 1C. 

 Anal opening very small, close to apex. Ventral side with a few very 

 minute ducts. Circumgenital pores present in four groups, each with 

 about 10 pores. 



