THE SCALE INSECT GENUS ASTEROLECANIUM 41 



about 7.2 fj. long, outer ventral 9-12.6 fi long ; anal ring with 6 setae 20-27 y. long, 

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

 apex slightly sclerotized. 



Larva. — Elongate ovoid. 



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

 the others, which are nearly uniform in size, but the anterior pair slightly the 

 largest, axes of the posterior 6 pairs of pores transverse, of the others longi- 

 tudinal : a pair of setae close to each of the posterior 3 pairs ; 3 pairs of setae 

 anteriorly. 



Dorsal surface: 8-shaped pores in a lateral row of 1-6 (usually 3-6 j on only 

 one-half or on each half of body, with a total of 1-12 (usually 9-11 1 . larger than 

 marginal pores of same segments near posterior end, but of practically the same 

 size as marginal near anterior end ; disk pores near marginal 8-shaped pores and 

 a few in median area. 



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

 fairly stout. 2 slender ; bases of antennae one-half length of antenna apart ; beak 

 setae. 2 pairs apical and 1 pair basal : each spiracle with 1 trilocular and either 

 1 quadrilocular. quinquelocular. or small multilocular 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 length of 

 tarsus : 8 pairs of submarginal 8-shaped pores, none between antennae ; 9 pairs 

 of submarginal minute setae, on abdomen and thorax. 3 pairs of submarginal 

 larger setae on head; 1 pair of setae between antennae. 



Apex of abdomen : Notch present, lobes indicated ; setae, apical apparently Ti 

 [i long, interapical 9 y. long, dorsal 3 y long, intermediate ventral 3.6 y long, 

 outer ventral 5.4 y long; anal ring with 6 setae, each about 23 y long, also with 

 an inner row of 6 and an outer one of 12 pores, divided on dorsal and ventral 

 sides. 



Test of male. — Elliptical, with a minute notch in posterior margin; 1.25 mm. 

 long, 0.85 wide: slightly convex dorsally and faintly striated transversely, flat 

 ventrally : bright yellow, transparent, thin, shiny; fragmentary marginal fila- 

 ments whitish. 



Adult male. — 1 mm. long. 



Head: Antenna 10-segmented, formula (longest to shortest), (III, IV, X), 

 (V, VI), (VII, VIII. IX), (I, II) ; antennnal setae. I. 4: II. 11: III-VIII, 13-17: 

 IX, 21 : X. 21 short and 4 very long : basal bars strongly diagonal : 20 setae 

 anterior to ventral eyespots : 3 or 4 minute tubercles dorsally near antennae. 



Thorax: Bar between wing bases curved on anterior margin, four times as 

 long as wide; with a large triangular clear area and a longitudinal fold in 

 center ; tibia one and a half times length of tarsus. 



Abdomen: Six segments each with a pair of serae dorsally on lateral margin, 

 3 segments each with a pair of setae in ventral lateral area : lobes indicated. 

 each with 1 long and 4 short setae: penis sheath with 1 pair of setae dorsally 

 near base, 2 pairs of setae ventrally near base, and at least 5 smaller setae on 

 each side of ventral opening. 



Male nymph. — Exhibiting no distinguishing characters other than tho<e de- 

 scribed for adult male. 



Data. — Described from unmounted and the following mounted ma- 

 terial (all unmounted and mounted specimens, except holotype. are 

 paratypes) : Fifteen females on Agave pafoneri, El Paso. Tex.. C. H. 

 Popenoe. October 1. 1922. holotvpe and paratvpes: 2 females on Yucca 

 sp. ?. Ariz.. D. W. Coquillett. November 8. 1893: 10 female? and 7 lar- 

 vae on Agave sp.. El Paso. Tex., J. X. Rose. May 18. 1008: 16 females 

 and 5 larvae on Agave sp.. El Paso. Tex.. C. R. tircutt. May 6. 1924: 12 

 females. 4 larvae. 2 adult males, and 2 male nymphs on' Yuoea sp.. 

 Franklin Mountains, Tex., X. Perrine. February 1926. 



This species resembles cristatwm and puteamtm. It can be distin- 

 guished from cristatwm by the practically uniform size and smaller 

 number of dorsal 8-shaped pores, and from puteamvm by a smaller 

 number of marginal quinquelocular pores, and the presence of a mar- 

 ginal row of disk pores. 



