72 MISC. PUBLICATION 4 2 4, U. S. DEPT. OF AGRICULTURE 



Asterolecanium coronatum Green 



(Fig. 16, N; fig. 17, A-E; pi. 5, H) 



Described in 1909 (4#, p. 327) . 



Habit. — Living on stems. 



Test of female. — Anterior five-sixths usually nearly circular and posterior sixth 

 strongly narrowed, produced, and tip upturned, but test rarely elongate ovoid; 

 0.85-1 mm. long, 0.65-0.85 wide; strongly convex dorsally with sides nearly per- 

 pendicular, a strong longitudinal median, a curved lateral carina, and a deep 

 sunken area between median and lateral carinae ; flat ventrally ; brownish yellow, 

 transparent to translucent, punctate; marginal and dorsal filaments pale to 

 bright pink, the latter arranged in 12 or 14 groups within a submarginal ring 

 (situated on lateral carinae, the longest ones sometimes, fused and appearing 

 of same consistency as test) and scattered elsewhere ; filaments of the groups 

 variable in length, but some longer than the marginal ones, the others mostly 

 shorter ; circular larval exit at end of produced area. 



Adult female. — Of same shape as test, 0.75-0.9 mm. long, 0.6-0.8 wide. 



Margin : 8-shaped pores in a single row terminating about three times the 

 length of a posterior pore from bases of apical setae, usually 6-8 ix long and 4-5 

 wide on narrowed area and 8-9 ,u long and 4.5 wide elsewhere, usually a pore's 

 length apart, but sometimes slightly more ; quinquelocular pores in a crowded sin- 

 gle or irregularly double row, the position of several posterior pores shifting dor- 

 sad, and the row terminating slightly dorsad of the margin anterior to, and slightly 

 entad of, apical setae, with 3 or 4 posterior to the posterior pair of 8-shaped pores ; 

 1 opposite each 8-shaped pore and 1 opposite each interval between 8-shaped 

 pores on produced area, two or three times as numerous as 8-shaped pores 

 elsewhere. 



Dorsal surface : 8-shaped pores scattered over most of surface except produced 

 area, usually 13 large pores arranged in a submarginal row and each of large 

 pores surrounded by a circle of 6-13 smaller pores, also several pores between 

 outer circumference of circles and body margin ; median area strewn with 

 8-shaped pores tending toward arrangement in transverse rows ; largest pores 

 in submarginal row 12-16 \i long and 8-9 wide, most of pores in circles 8-9 n long 

 and 5 wide, others 7-8 fi long and 4 wide ; minute 8-shaped pores on base of 

 produced area and a few scattered wherever the large 8-shaped pores are rather 

 sparse ; disk pores very sparse ; tubular ducts 27 n long ; dorsal tubes present. 



Ventral surface : Antenna circular, dome-shaped, sunken in derm, with 2 setae 

 longer than diameter of antenna ; beak without setae ; spiracle with bar fairly 

 broad and with atrium somewhat enlarged ; anterior spiracle with 3-6 quinque- 

 locular pores in atrium and 7-15 such pores between spiracle and body margin 

 in a double or triple row ; posterior spiracle with 7-12 pores in atrium and 

 over edge of opening, 9-20 between spiracle and body margin in a double or 

 triple row ; enlarged quinquelocular pores, replacing multilocular pores and 

 totaling 22-25, in 8 rows, all anterior to genital opening, 4 pores in each of 

 posterior 4 rows and 3-6 in each of anterior 4 rows ; 4 or 5 dark-rimmed 8-shaped 

 pores each side of mouth parts, a few in lateral area anterior to mouth parts and 

 arranged roughly in 5 or 6 transverse rows on abdomen : submarginal 8-shaped 

 pores in a crowded single row (nt some points an irregularly double row) ter- 

 minating near narrowed part of abdomen, at least as numerous as marginal 

 8-shaped pores and occasionally slightly more so ; 2 or 3 disk pores posterior 

 to terminating point of submarginal 8-shaped pores ; 6 pairs of submarginal setae 

 on abdomen, the posterior pair opposite the posterior pair of marginal 8-shaped 

 pores ; 1 pair of setae posterior to genital opening and 1 pair each in posterior 

 and penultimate rows of enlarged quinquelocular pores. 



Apex of abdomen : Setae, apical 7-10 n long, interapical apparently absent, 

 inner ventral 3.6 n long, outer ventral (possibly the interapical, but directly 

 anterior to apical on ventral surface) 3.6 fi long; anal opening in margin, anal 

 tube sclerotized, rather short, nearly cylindrical ; anal ring w T ith 6 setae 25-27 

 fi long, and with an inner row of 6 and an outer one of 12 pores, tending toward 

 division on dorsal side ; ventral surface of apex slightly rugose. 



Second stage. — Resembling adult but all observed specimens elongate ovoid 

 in outline ; margin with quinquelocular pores in a single row terminating 5 

 8-shaped pores from the posterior pair of 8-shaped pores, 1 opposite each 



