THE SCALE INSECT GENUS ASTEROLECANIUM 37 



Asterolecanium acaciae Morrison and Morrison 



(Fig. 2, J-8; pi. 6, K) 



Described in 1927 (73, pp. 3-J+). 



Habit. — Living on bark, in shallow or fairly deep pits. 



Test of female. — Varying in outline, usually practically circular, measuring 

 1.25-1.5 mm. in diameter, and with posterior end occasionally slightly produced 

 and upturned ; very slightly convex dorsally, usually with a few faint transverse 

 striations posteriorly, slightly convex ventrally ; brownish yellow, semitransparent, 

 punctate in submarginal area ; fragmentary marginal filaments whitish or very 

 pale pinkish ; elliptical larval exit in margin. 



Adult female. — Practically circular, 1.25-1.5 mm. in diameter. 



Margin : 8-shaped pores mostly in a double row, but posterior 6-12 pores usually 

 in a single row terminating about four times a posterior pore's length from bases 

 of apical setae, posterior pores 8 n long and 5.4 wide, the others about 10 y. long 

 and 7.2 wide, spaced once, twice, or rarely three times a pore's length apart; the 

 double rows separated by a distance varying from the width to the length of 

 a pore ; quinquelocular or small multilocular pores in a complete single row or 

 missing for a few 8-shaped pores at anterior end, terminating near end of double 

 row of 8-shaped pores, usually twice as numerous as 8-shaped pores of nearer 

 row between spiracular pore bands and as numerous as 8-shaped pores elsewhere. 



Dorsal surface : Minute 8-shaped pores numerous ; disk pores very sparse ; tubu- 

 lar ducts 28 ix long. 



Ventral surface : Antenna roughly conical, with 2 setae as long as, and 1 

 shorter than, diameter of antenna ; beak apparently without setae ; spiracular 

 bar rather broad; 22-35 quinquelocular pores extending from spiracle to body 

 margin in an irregularly single to a quadruple row ; multilocular pores, with 10 

 loculi, arranged in 4 complete and 1 or 2 interrupted rows, with 8-10 in each 

 of the posterior 3 rows, 6-8 in anterior complete row, and 2 in each of interrupted 

 rows, a total of 35-40 ; 4-6 dark-rimmed 8-shaped pores each side of mouth parts, 

 a few scattered anterior to mouth parts, others arranged in rather indefinite 

 transverse rows posterior to mouth parts ; submarginal 8-shaped pores in a single 

 row terminating near posterior row of multilocular pores, about one-half as 

 numerous as marginal 8-shaped pores of nearer row ; submarginal setae 

 apparently in 7 pairs, all posterior to posterior spiracles, the posterior pair 

 sometimes nearly opposite the posterior pair of marginal 8-shaped pores but 

 occasionally close to outer ventral setae ; 2 pairs of setae in each complete row 

 of multilocular pores, except sometimes only 1 pair in anterior row. 



Apex of abdomen : Setae, apical broken, apparently 35 fx long, interapical (on 

 ventral surface near margin) about 8 /x long, intermediate ventral about 6 fx 

 long, outer ventral apparently 8 /x long; anal opening apical, circular, its margin 

 slightly sclerotized. 



Larva. — Apparently elongate ovoid. 



Margin: With 28 8-shaped pores which are smallest at the posterior end 

 of the row and gradually increase in size anteriorly, where they are distinctly 

 larger than the posterior 3 pairs, axes of all pores longitudinal; apparently 

 without setae anteriorly. 



Dorsal surface : 8-shaped pores apparently in a submedian and a lateral row 

 of about 6 or 8 each, on each half of body, with a total of about 30, slightly varia- 

 ble in size, the largest smaller than a posterior marginal pore ; disk pores between 

 submedian and lateral 8-shaped pores. 



Ventral surface : Antenna apparently 5-segmented : antennal setae. I. 1 : IV 

 probably normally with 1, but sometimes with 2; V, 2 long, 4 stout, and 1 slender ; 

 antennal bases apparently separated by two-fifths Length of antenna; beafc 

 setae, 1 pair apical, 1 pair median, 1 pair basal : spiracle witli 1 trilocular pore: 

 leg setae, coxa 3, femur 1 on inner margin near base, tarsus 1 each on inner and 

 outer margins (minute setae on inner margin near claw present in most species, 

 not apparent) ; tibia one-half length of tarsus; S pairs of Submarginal 8-shaped 

 pores of which 1 pair is between the antennae; apparently 6 pairs of submarginal 

 minute setae posterior to posterior spiracles and 1 pair of submarginal larger 

 setae anteriorly; 2 pairs of setae between antennae and mouth parts. 



Apex of abdomen: Setae, apical apparently 45 /n long, interapical 3.6 fu long. 

 intermediate ventral (observed only on 1 side of body) 1.5 ,u long, outer ventral 

 1.8 n long; anal opening ventral, close to margin, circular, the surrounding derm 

 faintly sclerotized. 



