ART. 17 MASKELL ASTEROLECANIINAE MORRISON 31 



terior to margin ; cribriform plates approximately circular, relatively 

 large and conspicuous, densely pitted, normally in two longitudinal 

 rows of five each; tiny simple pores distributed sparsely but fairly 

 uniformly over the dorsal surface and to some extent along the 

 margin ventrally ; anal region not unusual, the plates rather heavily 

 ridged and wrinkled, with two moderately stout setae near the outer 

 end of each plate and at about its middle dorso-ventrally, these about 

 ISfx long, each anal plate with from one to three or four small cir- 

 cular pores ; apical seta moderately elongate, stout, length about 60;a ; 

 anal ring with 10 setae, length of one about 125)1*. 



PreaduU female. — In general resembling the adult; legs more evi- 

 dent, antennae with fewer segments, spiracular grooves with fewer 

 disk pores, the anterior with two elongate spines at margin, tlie 

 posterior split into two diverging rows but without spiracular spines, 

 as in adult; anal ring with eight setae. 



Larva. — Elliptical or somewhat tapering behind, length about 

 430/A, width about 230/x; antennae as in other species, legs not un- 

 usual; marginal setae short, not stout, with a pair of small anterior 

 spiracular spines on each side, the posterior ones wanting as in 

 adult; with a few minute setae dorsally and ventrally; 8-shaped 

 pores in a submedian, intermediate and marginal row on each haft 

 of the body, and in a ventral submarginal row, these last much 

 smaller than the dorsal pores; with a few (two to four) normally 

 quinquelocular disk pores between spiracles and body margin; ven- 

 tral surface of abdomen with one pair of much more elongate slender 

 setae anterior to the anal plates; anal plates wrinkled, each bear- 

 ing a single moderately stout seta near apex; anal ring with six setae; 

 apical seta quite elongate. 



Cotype.— Cat. No. 40372, U.S.N.M. 



The apparently normal absence of the posterior spiracular spines 

 in this species seems to be a noteworthy, and perhaps a distinctive 

 structural featu^^. 



LECANIODIASPIS PROSOPIDIS (Maskell) 



Plate 24, figs. 1-20 ; Plate 29, fig. 5 



Reference.— Fernnld, Cat. Cocc. World, 1903, p. 55. 



There are five slides of this species in the Maskell collection, three 

 of " adult female, 1894," one of " antennae of female, 1894," and one 

 of "abdomen of female, 1894." These are in fair condition only. 

 Some unmounted specimens are included under No. 417. The fol- 

 lowing redescription is based on mounts prepared from this, supple- 

 mented by specimens collected by Dr. E. A. Schwarz in 1897 at 

 Tuscon, Ariz., on Prosopis. 



