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



Asterolecanium cristatum Ferris 



(Fig. 17, F-O; pi. 7, J) 



Described in 1921 (33, pp. 73-74). 



Habit. — Living on bark. 



Test of -female. — "Test about 1.5 mm. long, oval, high convex, in unrubbed 

 specimens entirely covered with short curling wax filaments and with numerous 

 long filaments which are as long as the test itself, these frequently forming a 

 prominent crest. Rubbed specimens of a uniform green." (33, pp. 73-74-) 



Adult female. — Practically circular, posterior end slightly produced; around 



1 mm. in diameter. 



Margin : 8-shaped pores in a single row terminating two or three times a pore's 

 length from bases of apical setae, posterior pores 10 ix long and 6 wide, the 

 others 12 jjl long and 8 wide, about the length of a pore apart ; quinquelocular 

 pores in a single row between the spiracular pore bands, extending 6-14 8-shaped 

 pores anterior to anterior spiracular pore bands and 14-27 posterior to posterior 

 spiracular pore bands, as numerous as 8-shaped pores at ends of row, elsewhere 

 up to twice as numerous as the corresponding 8-shaped pores ; disk pores dorsad 

 of 8-shaped pores or between them, terminating with 2 or 3 posterior to the 

 posterior pair of 8-shaped pores, irregularly spaced and less numerous than 

 8-shaped pores. 



Dorsal surface : 8-shaped pores tending toward a broad longitudinal grouping 

 along median line and toward indefinite transverse groupings on posterior half 

 of specimen, but without apparent arrangement on anterior half, relatively few 

 pores 16-20 /x long and 12-15 wide interspersed among many pores 12-14 //. long 

 and 8-10 wide : minute 8-shaped pores not observed ; disk pores fairly numerous ; 

 tubular ducts 36 n long. 



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

 slightly longer and 2 or 3 slightly shorter than diameter of antenna ; beak with 



2 pairs of setae ; spiracular bar broad, nearly subcircular, 20-27 quinquelocular 

 pores extending from spiracle to body margin in an irregularly double or triple 

 row ; multilocular pores, with 8-10 loculi, apparently arranged in 5 complete and 

 4 interrupted rows, with anterior row anterior to posterior spiracles, arrange- 

 ment not exactly determinable in available specimens but somewhat as follows : 

 Posterior row with 10-16, penultimate with 20^25, each of next 2 with 15-22, 

 next with 10, each of next 3 with 4-6, anterior row with 2, a total of 88-98: 



3 or 4 dark-rimmed 8-shaped pores each side of beak, a few scattered on anterior 

 end, and a few on abdomen in lateral area ; submarginal 8-shaped pores in an ir- 

 regularly single row terminating near posterior row of multilocular pores, usually 

 1 opposite each marginal 8-shaped pore anteriorly and 1 opposite every other 

 8-shaped pore elsewhere ; submarginal setae in a complete row terminating 

 nearly directly anterior to the posterior pair of marginal 8-shaped pores ; 1 

 pair of setae in each of the posterior 3 rows of multilocular pores. 



Apex of abdomen : Notch present, lobes indicated ; setae, apical 92 fi long, 

 interapical 20 fi long, dorsal 10-12 /j. long, intermediate ventral 6 m long, outer 

 ventral 8 m long : anal ring with 2 setae 30 ix long and four 36 n long, the number 

 of pores indeterminable, -apparently tending toward division on dorsal side ; 

 ventral surface of apex sclerotized and rugose. 



Larva. — Nearly elliptical, posterior end slightly narrowed. 



Margin : With 28 8-shaped pores, the posterior 6 pairs slightly smaller than 

 the others and their axes transverse, axes of the others longitudinal ; a pair of 

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



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

 of 11 (2 or 3 lateral pores outside a straight line), on each half of body, 

 posterior pore of each row slightly smaller than the others, all slightly smaller 

 than marginal pores of same segments; disk pores between lateral and marginal 

 and a few between submedian and lateral 8-shaped pores. 



Ventral surface: Antennal setae I, 2; IV, 1; V, 0; VI, 2 long, 2 stout, 3 

 fairly stout, 2 slender ; bases of antennae one-third length of antenna apart ; 

 beak setae, 2 pairs apical, 1 pair basal ; spiracle with 1 trilocular and 1 quin- 

 quelocular pore or with 2 trilocular pores ; 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 ; 7 pairs of 

 submarginal 8-shaped pores, none present between antennae; 10 pairs of sub- 

 marginal minute setae, on abdomen and thorax, 2 pairs of submarginal larger 

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



