THE SCALE INSECT GENUS ASTEROLECANIUM 209 



Asterolecanium THANSVERSUM Morrison and Morrison 



(Fig. 72, Z.-.V; fig. 73, .4, B; pi 6, B) 



Described in 1927 {73. pp. 7-8). 



Habit. — Living on bark, in pits. 



Test of female. — Usually wider than long, posterior end sometimes slightly 

 produced ; around 1 mm. long and 1.2 wide or 1-1.5 mm. in diameter ; flat to slightly 

 convex dorsally, with faint transverse striations ; convex ventrally; brownish 

 yellow, transparent, thick, rather rough, dull ; marginal filaments whitish, frag- 

 mentary ; elliptical larval exit in margin. 



Adult female. — Usually wider than long, measuring around 0.8 mm. long and 



1 wide. 



Margin : 8-shaped pores in a single row terminating three or four times a 

 pore's length from bases of apical setae, a few pores out of alignment or set 

 diagonally to margin, posterior pores 8-9 n long and 5 wide, the others 9-10 ft long 

 and 6-7 wide, usually a pore's length apart ; quinquelocular pores in a single row. 

 usually terminating posterior to posterior pair of 8-shaped pores although some- 

 times between penultimate and posterior pores, slightly more numerous than 

 8-shaped pores. 



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

 tubular ducts 28 \i long. 



Ventral surface: Antenna thimble-shaped, with 2 setae longer than diameter of 

 antenna; 3-8 quinquelocular pores between antenna and margin; beak with 2 

 pairs of setae; spiracular bar broad; 9-16 qninquelocular pores extending from 

 spiracle to body margin in a single row: multiloeular pores, totaling 74-88 and 

 with 9 or 10 loculi. in 5 complete and 4 interrupted rows, anterior row usually 

 anterior to posterior spiracles, posterior row with 5-7 pores, penultimate row with 

 9-15, each of next 3 with 10-17. next with 8-10. next with 4-7. next with 4. and 

 anterior row with 2 ; 1 or 2 dark-rimmed 8-shaped pores each side of beak, a few 

 scattered on anterior end and a few tending toward arrangement in 2 transverse 

 rows among multiloeular pores; snhmarginal 8-shaped pores in a single row 

 terminating near penultimate row of multiloeular pores, about half as numerous 

 as corresponding marginal 8-shaped pores: snhmarginal setae in a complete 

 row terminating about halfway between posterior marginal 8-shaped pores and 

 apical setae: 2 pairs of setae in posterior row of multiloeular pores and 1 pair in 

 each of the next 2 rows. 



Apex of abdomen: Notch present: lobes indicated: setae, apical (tips broken) 

 60 ^ long, interapical 9-10.8 ,u long, inner ventral 2 u long-, intermediate ventral 

 4-5.4 n long, outer ventral 5.4-7.2 m long: anal ring with 6 setae 27 o. long 

 and with an inner row of 6 and an outer one of 14 or 16 pores; ventral surface of 

 apex with a short sclerotized area extending anteriorly from intermediate ventral 

 seta. 



Larva. — Elongate ovoid. 



Margin: With 28 8-shaped pores, axes of the posterior pairs transverse or 

 diagonal, of the others longitudinal : 2 pairs of setae ai anterior end. 



Dorsal surface: 8-shaped pores in a submedian row of 9 or 10 and a lateral row 

 of 11 or 12. on each half of body, 4 pores of lateral row outside the line of the 

 others and suggesting a submarginal row. practically uniform in size or anterior 

 pores larger than the rest, distinctly smaller than marginal pores: disk pores 

 between submedian and lateral, and between lateral and marginal, 8-shaped pores. 



Ventral surface: Antenna] setae. I, 2; IV. 1 : V. 1 ; VI. 2 long. 2 stout. 3 fairly 

 stout. 2 slender: antennal bases one-third length of antenna apart : beak setae, 



2 pairs apical. 1 pair basal: anterior spiracle with 2 trilocular pores, posterior 

 with 1 : leg setae, coxa 4. femur 1 on inner margin near base and 1 on outer margin 

 near center, tarsus 1 each on inner and outer margins: tibia one-half as long as 

 tarsus: 10 pairs of submarginal 8-shaped pores: 8 pairs of submarginal minute 

 setae, on abdomen and thorax. 3 pairs of submarginal larger setae at anterior end ; 

 1 pair of setae between antennae and mouth parts. 



Apex of abdomen: Notch present: setae, apical 54 ft long, interapical 7.2 M 

 long, inner ventral 2.5 fi long, intermediate ventral 5.4 m long, outer ventral 4.8 n 

 long; anal ring with 6 setae 21.6 m long and with an inner row of 6 and an outer 

 of 1-4 pores, divided on dorsal and ventral sides; ventral surface of apex 

 heavily seloroiizod in a small area extending anteriorly from each intermediate 

 ventral seta, lightly sclerotized elsewhere. 

 286720—41 14 



