THE SCALE INSECT GENUS ASTEROLECANIUM 79 



Data. — Described from unmounted specimens (paratypes) and the 



following 1 mounted material removed from U. S. X. H. plants col- 

 lected by H. Pittier in the Canal Zone: Eleven females and 3 larvae 

 on Palmae (Cocos sp.?), vicinity of Las Graces, February 1. 1911, 

 holotype and paratypes; 2 females on Acristaeea ? and 2 females 

 on Palmae. between Gorgona and Gatun, June 7, 1911, paratypes. 



Although this species is closely related to simile, it differs from it in 

 having only 1 or 2 8-shaped pores in the marginal row between the 

 interruptions and the apical setae, approximately 14 multilobular 

 pores, the ring setae twice the length of the apical setae, and a 

 sclerotized heart-shaped area associated with the anal ring setae. 



The available larvae are very poor. Consequently the recorded 

 absence of minute setae near the posterior marginal 8-shaped pores is 

 not positive, and the exact number of submarginal setae is uncertain. 



Asterolecanium DisiuNCTUM, new species 



(Fig. 19, I-P ; pi. 6, L) 



Habit. — Living on the lower surface of leaves. 



Test of female. — Very elongate and slender, posterior end strongly upturned ; 

 2.5 mm. long, 0.4-0.5 wide ; strongly convex dorsally, sloping from median line 

 to margin, flat ventrally ; pale or bright yellow, transparent, fairly thin, slightly 

 punctate; marginal and dorsal filaments rubbed off; elliptical larval exit in 

 posterior surface of upturned area. 



Adult female. — Elongate and slender, about 2.25 mm. long, 0.4 wide. 



Margin : 8-shaped pores in a single row terminating length of apical seta from 

 bases of setae, posterior pores 6 \i long and 4 wide, others 8 fx long and 5 wide, 

 less than a pore's width apart at posterior end, slightly more than a pore's length 

 apart elsewhere ; quinquelocular pores absent, or 2 or 3 where each spiracular 

 pore band meets margin. 



Dorsal surface: One 8-shaped pore 12 /x long and 8 wide at anterior end, 

 sometimes 1-8 pores on median line posterior to mouth parts and measuring 

 9 ix long and 7 wide ; minute 8-shaped pores very numerous along median line, 

 sparse elsewhere ; disk pores sparse ; tubular ducts 24 y. long ; dorsal tubes 

 present. 



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

 antenna ; beak without setae : spiracular bar fairly broad : 6-10 quinquelocular 

 pores extending from spiracle to body margin in an irregularly single row ; 

 logs represented by 3 pairs of fairly stout claws ; multilocular pores, totaling 20 

 or 21 and with 10 loculi, arranged in 3 complete rows, the posterior row with 5. 

 middle with 7-0, and anterior with 7 or 8; 2 or 3 dark-rimmed 8-shaped pores each 

 side of beak, a very few on anterior end, and a few apparently arranged in 3 

 or 4 transverse rows anterior to anterior row of multilocular pores : submarginal 

 8-shaped pores in a single row terminating near anterior row of multilocular 

 pores, about one-half as numerous as marginal 8-shaped pores: 5 pairs of 

 submarginal setae on abdomen, the posterior pair about halfway between the 

 posterior pair of marginal 8-shaped pores and bases of apical setae; 1 pair of 

 setae in each row of multilocular pores. 



Apex of abdomen : Notch present : lobes indicated : setae, apical 68 \x long, inter- 

 apical 8-10 (i long, inner ventral 5.2 /x long, outer ventral 6 u long : anal ring with 

 setae 30-32 jx long and an inner row of 6 and an outer row of 16 pores, divided 

 on dorsal side. 



Data. — Described from one empty test and one mounted female on 

 Bambusa sp., Mengtze, Yunnan, China, N. Y. B. G., holotype. and 

 one empty test and two mounted females on Schizostachyv/m sp., Tung 

 King, Kwangtung, China. F. A. McClure, January 21, L932, paratypes. 



The presence of 3 pairs of claws differentiates this species from all 

 other known species on bamboo except rubrocomatum, from which it 

 differs in many respects. It is rather closely related to acutiUwn. 



