108 ASPIDIOTUS DICTYOSPERMI, VAR. 



extending from the base of each lobe. Rudimentary 

 antennae with a very long straight spine. Margin of 

 thoracic, and free abdominal segments with a few 

 spiny hairs. Rostral filaments, about three times the 

 length of the mentum. Pygidium (PL II, fig. 3) with 

 four widely separated groups of circumgenital glands ; 

 the anterior laterals of 3 4; the posterior laterals 

 2 3. Subdorsal groups of tubular spinnerets slender 

 (unless completely restored by boiling in potash they ap- 

 pear quite filiform), the longest reaching almost to the 

 articulation of the segment; connecting dorsal pores 

 in a short series of about four, and several smaller 

 ones scattered towards the margin ; there is also 

 a long, central, tubular spinneret connected with a 

 marginal pore between the median lobes. Vaginal 

 opening midway between the circumgenital glands. 

 Anal opening towards the margin. Margin of pygi- 

 dium (PI. XII, fig. 6) with three pairs of well-deve- 

 loped, subequal lobes ; each lobe with the inner lateral 

 margin entire, and curved outwards ; the outer lateral 

 margin with a deep notch, giving them a bilobed ap- 

 pearance. The median and second pairs of plates 

 short, and fringed ; the three between the second and 

 third lobes of the same structure and length ; there are 

 from three to five beyond the third lobe; the first, 

 when present, simple and pointed; the second and 

 third constricted in the centre, forming a long, spear- 

 shaped, pendulous, projection ; margin of basal portion 

 sharply serrate ; the fourth plate is either of a similar 

 structure to the latter, or is deeply divided and simple, 

 with the outer margin long, and finely serrate ; margin 

 beyond finely serrate and with several dentitions, 

 widely apart. Within the margin are five pairs of 

 large club-shaped glands ; each pair connected with 

 the margin between the lobes. The spines are minute 

 and placed a little in front of the lobes. 



As the embryo larvae are well formed within the 

 body of the parent I presume the females are ovivi- 

 parous. 



