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



ASTEROLECANIUM HEMISPHAERICUM Kuwana 

 (Fig. 29, K-Oj fig. 30, A-E ; pi. 2, B) 



Described in 1916 (65, pp. 147-14$) on stems and brandies of bamboo 

 in Japan. 



Habit. — Living on stems, often near nodes. 



Test of female. — Elongate ovoid, 2.5-3 mm. long, 1.5-2 wide ; strongly convex 

 dorsally, particularly near anterior end, from where it falls abruptly to anterior 

 margin but slopes gradually to posterior margin ; slightly concave ventrally ; pale 

 greenish yellow, transparent, smooth, shiny ; marginal filaments whitish, frag- 

 mentary ; larval exit elliptical, in margin. 



Adult female. — Elongate ovoid, 2 mm. long, 1.5 wide. 



Margin : 8-shaped pores mostly in a double row but in a single row near 

 posterior end of body, terminating about one-half length of apical seta from 

 bases of setae, 12-13 /* long and 8 wide, usually separated by about the length 

 of a pore, the 2 rows usually separated by less than the width of a pore ; quinque- 

 locular pores in a row mostly 4 pores wide but sometimes 6 pores wide at 1 or 

 2 points, 3 pores wide before terminating point, and only 1 pore wide at end, which 

 is 10-20 8-shaped pores from the last pair of pores in that row ; disk pores 

 along dorsal row of 8-shaped pores, terminating nearer to bases of apical setae 

 than to the posterior pair of marginal 8-shaped pores, usually as numerous as 

 8-shaped pores of dorsal row. 



Dorsal surface : Minute 8-shaped and disk pores numerous ; tubular ducts 

 scattered except near posterior end, 16 m long ; dorsal tubes present. 



Ventral surface : Antenna circular, slightly raised, with 1 seta shorter and 2 

 longer than diameter of antenna ; 15-20 quinquelocular pores in a triple or 

 quadruple row between antenna and margin ; beak apparently without setae ; 

 spiracle with bar subcircular, with atrium expanded, shallow, and filled with 

 quinquelocular pores which continue over edge of opening and extend to body 

 margin in a row 3-8 pores wide, 125-140 in atrium and row combined ; multi- 

 locular pores, totaling 98-117 and having 6-11 loculi, arranged in 2 complete and 

 6 interrupted rows, the penultimate row interrupted but the first row anterior to 

 it complete, posterior row with 13 pores, penultimate with 7-10, next with 8-12, 

 next with 11-15, next with 15-18, next with 14-18, next with 17-20, and anterior 

 row with 13-15 ; genital opening obscure in 1 of specimens studied, not at all ap- 

 parent in others ; a loose group of 10-15 dark-rimmed 8-shaped pores each side of 

 mouth parts, some scattered on anterior end. and others tending toward arrange- 

 ment in 6 transverse rows posterior to mouth parts ; submarginal 8-shaped pores 

 in a double row terminating near first row anterior to penultimate row of multi- 

 locular pores, about one-half as numerous as marginal 8-shaped pores of the 

 adjacent row ; 7 pairs of submarginal setae on abdomen, the posterior pair near 

 the sixth posteriormost pair of marginal 8-shaped pores ; 4 setae in posterior row 

 of multilocular pores, 2 in penultimate row, and 1 in first row anterior to 

 penultimate. 



Apex of abdomen : Notch present ; setae, apical 35 //. long, interapical 10.8 m long, 

 inner ventral 5.4 fi long, outer ventral 9 m long ; anal ring with 6 setae 36 n long 

 and an inner row of 6 and an outer row of 16 or 18 pores, tending toward division 

 on dorsal side ; ventral surface of apex slightly sclerotized and lined. 



Larva. — Elliptical. 



Margin : With 28 8-shaped pores, the posterior pair and the anterior 4 pairs 

 slightly larger than the others, axes of all longitudinal ; 3 pairs of setae anteriorly. 



Dorsal surface : 8-shaped pores in a submedian row of 10 or 11 on each half 

 of body, the anterior 2 pores larger than the others, all practically same size as 

 marginal pores of the corresponding segments ; disk pores closer to marginal 

 than to submedian 8-shaped pores. 



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

 stout, 2 slender ; antennal bases one-fourth length of antenna apart ; beak setae, 

 2 pairs apical, 1 pair median ; spiracle with 1 trilocular and 1 quinquelocular 

 pore ; leg setae, coxa 4, femur 1 on inner margin near base and 1 each on inner 

 and outer margins near center, tarsus 2 on inner and 1 on outer margin ; tibia 

 one-half as long as tarsus ; 9 pairs of submarginal 8-shaped pores : apparently 

 8 pairs of submarginal minute setae, on abdomen and thorax, 3 pairs of sub- 

 marginal larger setae at anterior end ; 1 pair of setae between antennae. 



