156 Annals Entomological Society of America [Vol. X, 



shining, after clearing in KOH seen to be covered with microscopic 

 pits, increasing in size posteriorly; hairs scattered over cephalic and 

 thoracic areas, and on dorsal and ventral surfaces of abdomen in trans- 

 verse rows, one on each segment; a pair of backward directed lateral 

 spines increasing in size posteriorly on each abdominal segment; on 

 ventral surface of segment eight single long lateral bristles ; pores of three 

 types — a median ventral row of large pores anterior to anal tube and 

 varying in number from two to four; medium-sized lateral pores on 

 each abdominal segment dorsally and ventrally; small pores as follows: 

 a pair on the mesothorax, a pair on the metathorax, two pairs on each 

 segment of the abdomen ventrally; dorsally a pair on the metathorax, 

 two pairs on the first seven abdominal segments and three pairs on the 

 eighth; in lateral view pores resemble short chitinous tubes (PI. XIV, 

 figs. 20a and 20b). 



Female, second, third and fourth stages. — Length from about 1 mm. 

 to 4 mm., breadth from about 1.75 mm. to about 3 mm. Color deep 

 red, posterior end of body brown owing to chitinous nature of last 

 abdominal segments. Shape sub-spherical; segments not clearly 

 defined; posterior segments more compressed than in stage one. Eyes 

 represented by small black pigment spots (disappearing on boiling in 

 KOH), situated near, but not contiguous to antennal discs. Antennae 

 represented by microscopic chitinous discs bearing a few hairs varying 

 in length and number. Legs wanting. Rostrum large, situated about 

 middle of body. Anal tube in second stage with an increased number 

 of spinnerets opening into it anteriorly and a sparse median transverse 

 circle of spinnerets, in third stage with three anterior circles of spin- 

 nerets and one median transverse circle, in fourth stage with five 

 anterior circles of spinnerets and two median transverse circles (PI. XIV, 

 fig. 21). Two pairs of thoracic and eight pairs of abdominal spiracles; 

 the fonner inconspicuous, the latter with well developed stigmatal 

 tubes differing from those of first stage as illustrated (PI. XIV, figs. 

 3 and 6), and increasing in length in the successive instars; one row of 

 pores in constriction in second and third stages and two rows in fourth 

 stage. Integument smooth and shining; after clearing in KOH seen 

 to be covered with microscopic pits, increasing in size posteriorly; 

 lateral abdominal spines increasing in size posteriorly; a few hairs 

 scattered over body. Pores of two types (PI. XV, fig. 2) — large pores 

 scattered on anterior cephalic area; a few small lateral pores on thorax, 

 large and small pores arranged in transverse rows on segments one to 

 seven of abdomen. In the successive stages hairs and spines increase 

 in size and pores in number. Pores much more numerous in fourth 

 than in preceding stages, and in all stages increasing in number 

 posteriorly. 



Female, fifth stage, adult. — Length varying from 5.5 mm. to 4 mm., 

 breadth from 4 mm. to 3 mm. Color when living dull brownish red; 

 antennae and legs brighter. Shape oval, broadest in thoracic region, 

 broadly rounded at posterior end; segments all well defined. Eyes 

 small, black; situated laterad to antennae. Antennas long, stout, nine- 

 jointed; formula 1, 9, 2, 3, 6, 4, 7, (5, 8); joints one to four stoutest; 



