196 MISC. PUBLICATION 42 4, U. S. DEPT. OF AGRICULTURE 



ASTEROLECANIUM STENTAE Braill 



(Fig. 67, B-J; pi. 1, A) 



Described in 1920 (W, pp. HJf-115). 



Habit. — Living on twigs, in slightly depressed areas or in shallow pits. 



Test of female. — Practically circular, 2-2.5 mm. in diameter, posterior end 

 produced and sometimes upturned ; convex dorsally, with a broad longitudinal 

 median carina, and sometimes with faint transverse striations ; nearly flat or 

 slightly convex ventrally ; pale yellow, translucent to nearly opaque, rather thick, 

 slightly punctate ; marginal filaments whitish, shortest at posterior end ; dorsal 

 filaments whitish, arranged in transverse tufts along median line, and in incon- 

 spicuous transverse rows elsewhere, tuft filaments broken, but presumably longer 

 than the others, the majority of which are practically the same length as the 

 anarginal filaments ; larval exit elongate elliptical, in margin. 



Adult female. — Usually slightly longer than wide, sometimes nearly circular, 

 posterior end slightly produced ; 1.5-2.25 mm. long, 1.25-2 wide, or around 2 mm. 

 in diameter. 



Margin: 8-shaped pores in an irregularly single and double row terminating 

 once or twice a pore's length from bases of apical setae and usually irregularly 

 single around much of margin although distinctly double at some points, some- 

 times double except near posterior end, the pores 15-16 m long and 9 wide, sepa- 

 rated by a space varying from the width to the length of a pore, the 2 rows less 

 than a pore's width apart ; quinquelocular pores interrupted at anterior end for 

 a space equal to that occupied by 30-60 8-shaped pores, starting nearly opposite 

 antennae, and ending slightly nearer to posterior spiracular pore bands than to 

 apical setae, the row usually single, but sometimes distinctly double, triple at 

 several points, the pores as numerous as 8-shaped pores of nearer row at ends 

 of row and usually two or three times as numerous as that elsewhere ; disk pores 

 dorsad of 8-shaped pores and about half as numerous as those, terminating near 

 apical setae or along edge of anal opening, also occurring ventrad of 8-shaped 

 pores, this row terminating fairly near the posterior pair of 8-shaped pores, the 

 pores irregularly spaced and less numerous than those dorsad of 8-shaped pores. 



Dorsal surface : 8-shaped pores arranged in 7-9 transverse groups along median 

 line, and distributed between those groups and margin in fairly definite trans- 

 verse rows, majority of pores in median groups 16 fx long and 12 wide, those of 

 posterior and penultimate groups 12-13 fx long and 8-9 wide, the others around 

 12 ix long and 8 wide ; minute 8-shaped pores absent ; disk pores fairly numerous ; 

 tubular ducts 40 /x long. 



Ventral surface : Antenna irregular, usually sunken in derm, with 2 setae 

 longer and 2-6 shorter than diameter of antenna ; 2 or 3 trilocular or quinque- 

 locular pores between antenna and margin ; beak with 2 pairs of setae ; spiracle 

 with bar very broad, with a sclerotized subcircular area around opening and with 

 5-10 quinquelocular pores in sclerotized area, 35-55 similar pores extending from 

 spiracle to body margin in a row that is irregularly double to quadruple; multi- 

 locular pores, having 4-10 (usually 8-10) loculi, in 3 rows, one of which is 

 sometimes interrupted, posterior row with 7-21 pores, middle row with 9-27, 

 anterior row with 1-16, the total number observed ranging from 20-55 ; 3-7 dark- 

 rimmed 8-shaped pores each side of beak, a few scattered elsewhere, occasionally 

 2-4 posterior to beak; submarginal 8-shaped pores in a row 4-6 pores wide (the 

 pores far apart, some toward center of body), interrupted near each antenna, 

 but continued between them, and terminating near a transverse line through 

 about the twenty-fifth posteriormost pair of marginal 8-shaped pores, 4-6 oppo- 

 site every other marginal 8-shaped pore of nearer row ; 1-4 disk pores in each 

 spiracular pore band, 2-5 in each row of multilocular pores, and usually 1-3 

 in a transverse row anterior to multilocular pores: submarginal setae* in a 

 complete row terminating near third or fourth posteriormost pair of marginal 

 8-shaped pores ; 2-4 setae in each row of multilocular pores and 1 or 2 usually 

 anterior to multilocular pores. 



Apex of abdomen : Notch minute ; setae, apical 80-92 fx long, interapical 28-36 fx 

 long, dorsal 12-16 fx long, inner ventral 4-5.2 fx long, intermediate ventral 5.2-7.2 

 [x long, outer ventral (slightly outside intermediate and more nearly anterior to 

 interapical than to apical) 8 fx long; anal ring with 6 setae 80-92 fx long, and 

 apparently with 36 pores ; ventral surface of apex usually sclerotized in a small 



