palmer: coccid genus parlatoria. 138 



lar to elongate, and consists of two exuvia? with more or less of 

 secretionary area around the sides. 



Scale of Male. — The male scale is long, narrow, and non- 

 carinated, with the median portion depressed after escape of 

 male. The exuviae are at the cephalic end. The scale is usually 

 much smaller than that of the female. 



Pygidium of Female. — The most prominent characteristics 

 of the genus, found in the pygidium, are the conspicuous mar- 

 ginal gland pores, situated between the bases of the lobes and 

 giving a granulated appearance to the pygidium, and the 

 fringed plates or squames situated between the lobes. The 

 circumgenital glands or spinnerets are usually in four groups,, 

 but sometimes there are a few glands present representing the 

 missing median group as noted by Green ( 1899 ) and seen by 

 myself in thex. There are always three pairs of well-developed 

 lobes and sometimes rudiments of the fourth and fifth pairs. 



PARLATORIA ZIZYPHUS Lucas. 



Plate XXIII, figures 1 and 2. 



This species, being regarded as the type species of the genus 

 Parlatoria, is described first. The most important generic and 

 specific characteristics in the genus Parlatoria are found in the 

 pygidium of the female, and since it is only with these charac- 

 teristics that this paper pretends primarily to deal, there will 

 hereafter be no attention paid in descriptions to any character- 

 istics outside of the pygidium. The reason for this is the in- 

 constancy of the characters outside of the pygidium, such as 

 shape and color of scale and color of body. This can be plainly 

 seen on examination and comparison of literature and will be 

 brought out in the discussion of the synonymy of the species 

 herein discussed. 



There are four groups of spinnerets, also called circumgenital, 

 grouped, abdominal or ventral glands. These groups are des- 

 ignated as the anterior lateral and posterior lateral pairs of 

 groups. There are four pairs of lobes, the fourth lobe being 

 fairly well developed. The first three pairs are trilobate in 

 form ; the fourth lobe is about one-third the width of the third 

 lobe and tapers to a point. Its length is almost equal to that 

 of the third lobe. Between the bases of the lobes are the mar- 

 ginal-gland orifices or semilunar pores, which resemble, on 



