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



ASTEROLECANIUM ALGERIENSE (Newstead) 



(Fig. 4, L-O; fig. 5, A-D ; pi. 1, B) 



Described in 1897 (76, p. 99) as Planchonia algerieTisis on Spartium 

 junmum from Constantine, Algeria. 



Habit. — Living on stems. 



Test of female. — Somewhat ovoid, posterior end slightly produced ; 3 mm. long, 

 2 wide ; convex dorsally with posterior tip flattened and sometimes elevated, 

 flat or slightly convex ventrally ; whitish with a pale yellowish cast, translucent, 

 rather thick ; marginal and dorsal filaments whitish, fragmentary in specimens 

 examined ; larval exit elongate elliptical, in margin. 



Adult female. — Somewhat ovoid, 3 mm. long, 2 wide. 



Margin : 8-shaped pores mostly in a double row but posterior 25-30 pores in 

 a single row terminating about twice a pore's length from bases of apical setae, 

 posterior pores 12 \x long and 8 wide, the others 16-17 /j. long and 10 wide, intervals 

 between pores ranging from the width to the length of a pore, the two rows less 

 than a pore's width apart ; quinquelocular pores mostly in a double row, but single 

 at ends of row, starting posterior to antennae and terminating about halfway 

 between posterior spiracular pore bands and apical setae, as numerous as the 

 8-shaped pores of the nearer row at ends of row, and two or three times as 

 numerous as that elsewhere ; disk pores dorsad of 8-shaped pores, extending to 

 apical setae and continued anterior to setae along edge of anal opening, irregularly 

 spaced, sometimes 1 near each 8-shaped pore, but usually much less numerous 

 than that, also ventrad of quinquelocular pores, terminating anterior to bases of 

 apical setae, as numerous as those dorsad of 8-shaped pores. 



Dorsal surface : 8-shaped pores in 7 or 8 transverse groups along median line 

 and tending toward arrangement in transverse rows between groups and margin, 

 numerous median pores 16-18 n long and 12 wide, majority of others 15-16 n 

 long and 11-12 wide, a few near posterior end 9^-12 jj. long and 5-6 wide ; minute 

 8-shaped pores absent ; disk pores numerous ; tubular ducts 40 /u. long. 



Ventral surface : Antenna a circular disk, sunken in derm, with 2 setae longer 

 and 2 or 4 shorter than diameter of antenna ; 1-3 quinquelocular pores near an- 

 tenna ; beak with 2 pairs of setae ; spiracular bar broad ; a subcircular sclero- 

 tized area around spiracular opening having 6 or 7 quinquelocular pores, and 

 35-39 similar pores extending to body margin in a double or triple row, a total 

 of 42^14 in group and row combined ; multilocular pores in 3 complete and 3 

 interrupted rows with anterior interrupted row anterior to posterior spiracles, 

 posterior row with 21 pores, penultimate with 33, anterior complete with 25, 

 each of interrupted rows with 1-6, making a total of 91, the pores with 6-10 

 (usually 10) loculi ; 8 dark-rimmed 8-shaped pores each side of mouth parts, 

 some scattered anteriorly and others arranged in 7 transverse rows on abdomen ; 

 submarginal 8-shaped pores in a triple or quadruple row terminating near the 

 posterior marginal quinquelocular pores, the row broken up into groups which 

 are placed at fairly uniform intervals, but which contain a variable number of 

 pores, 1-5 pores opposite some marginal 8-shaped pores and none opposite others ; 

 disk pores in each spiracular quinquelocular pore band ranging from none to 4, 

 2 in each complete row of multilocular pores ; submarginal setae in a complete 

 row terminating 2 8-shaped pores from the posterior pair of marginal 8-shaped 

 pores ; 2 setae in posterior and penultimate rows of multilocular pores, 1 in 

 anterior complete row. 



Apex of abdomen : Notch very small ; setae, apical apparently 108 /x long, inter- 

 apical about 40 /j. long, dorsal 28 /x long, inner ventral 8 ix long, intermediate 

 ventral 10 /x long, outer ventral 12 fx long; anal ring with 6 setae, each about 

 96 fi long, apparently with around 45 pores arranged in an inner and outer row ; 

 ventral surface of apex heavily sclerotized in a small area around inner ventral 

 setae, the surrounding area slightly sclerotized in dentate rows. 



Larva. — Elongate elliptical. 



Margin: With 28 8-shaped pores, anterior pores slightly larger than the others, 

 axes of the posterior 6 pairs transverse, others longitudinal ; a pair of setae close 

 to each of the posterior 3 pairs of these pores ; 4 pairs of setae anteriorly. 



Dorsal surface : 8-shaped pores in a submedian row of 9 or 10 on each half 

 of the body, anterior pores very slightly larger than the others, practically equal 

 in size to marginal pores of same segments : disk pores close to submedian 8-shaped 

 pores and a few near margin ; a pair of setae near the anterior pair of 8-shaped 

 pores. 



