ASPTDIOTUS CYANOPTTYLLI. 125 



Female adult (PL IX, figs. 4 and 5) either widely 

 ovate, or very elongate and attenuated posteriorly. 

 The former may be considered typical; the latter a 

 remarkable elongated variety. Colour bright yellow ; 

 with apex of pygidium a little reddish. 



Anterior margin with several long slender hairs. 

 Rudimentary antenna3 with a long, usually curved 

 spine. No pores or glands on free abdominal seg- 

 ments. Spiracles reticulated as in A. hederse. Pygi- 

 dium (PL X, fig. 2) with four groups of circumgenital 

 glands ; the anterior laterals consist of three or four ; 

 the posterior laterals of three to five ; both groups 

 forming an irregular, single series ; the formula of five 

 examples are given below : 



3_3 . 4_3 . 4__3 . 4_4 . 33 

 3_3 . 4_4 . 33 . 44 . 4_5 



Vaginal opening opposite the anterior extremity of 

 the circumgenital glands. Anal opening very large, 

 midway between the posterior extremity of the glands 

 and the margin. Subdorsal groups of tubular spin- 

 nerets long and stout ; there are about four connected 

 with a corresponding number of large dorsal pores ; 

 a central group, usually numbering about three, is 

 connected with marginal pores. Margin of pygidium 

 (PL XII, fig. 5) with the median pair of lobes well 

 developed, and usually trilobate ; second and third 

 pairs much smaller, and pointed ; the third pair often 

 quite rudimentary. Plates long and deeply fringed ; 

 median and second pairs similar ; the three between 

 the second and third lobes sometimes with fine lateral 

 serrations ; there are usually three beyond the third 

 lobe, very deeply divided, and strongly furcate, or 

 branched ; not deeply and sharply ciliated as the cor- 

 responding plate in A. hederze. There is a spine at 

 the base of each lobe, on the outer lateral margin ; and 

 a pair beyond the plates, one dorsal, the other ventral. 

 Body-wall with three deep marginal notches, or inci- 

 sions, on each side of the median lobes. 



