84 ASPimOTTJS PERSONATUS. 



unusually large, mentum comparatively small, unex- 

 panded filaments extending beyond middle of pygidium. 

 Pygidium (PI. IV, fig. 1) very broad, indistinctly articu- 

 lated to first free abdominal segment, taking practically 

 the same contour as the body, and only slightly pro- 

 duced at the extremity. Vaginal opening central. 

 Anal opening towards the apex. There are two sub- 

 dorsal groups of long, filiform, tubular spinnerets, 

 apparently connected with minute marginal pores; 

 there is no trace of the dorsal pores to which similar 

 tubes are usually connected in other species. Margin 

 of pygidium (PI XI, Hg. ">) with six pairs of very 

 short lobes; the median pair, usually the longest, are 

 triangular, entire, or have the anterior margin faintly 

 notched; the second pair, much shorter, have one or 

 more notches on the anterior margin; the third pair 

 twice as broad as the second, and have the anterior 

 margin finely but roundly dentate; the remaining 

 three are very broad, have a similar dentate margin, 

 and at their base a continuous palisade-like structure, 

 probably due to the thickening of the dermis. The 

 plates are short, rudimentary, and spine-like; the three 

 between the third and fourth lobe are the most con- 

 spicuous. Spines all very small ; the first immediately 

 following the median lobes; the next the second lobe; 

 and the third and fourth opposite the lobes; beyond 

 the lobes there is usually one or more very minute 

 ones. Within the body -wall are six long, club-shaped 

 glands which are connected with minute pores at the 

 margin; there is one between the median and second 

 lobe, and another between the second and third lobe; 

 the two next are placed together between the third 

 and fourth lobe. 



I doubt very much if the three pairs of extra lobes 

 (fourth, fifth, and sixth) are anything more than mar- 

 ginal extensions of the body-wall, there being no line 

 of separation from the body as in the case of the 

 other lobes. 



Puparium of the male elongate ovate, anterior half 



