106 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 60. 



with both dorsal and ventral surface setae, with ventral micropores, 

 without distinct internal thickenings; intermediate stage similar to 

 adult, but less developed; young larva oval, antennae 5-segmented, 

 legs normal, anteriorly with a pair of large tubular ducts, apex of 

 body with a pair of large apical setae, lobes, gland spines and other 

 smaller setae. 



No other species has been included in this genus, which was based 

 wholly on the development of a supplementary fluffy secretion cov- 

 ering the female scale to some extent, a character which would seem 

 to be of very little value. In the opinion of the writers this genus 

 should be included in the Ghionaspis series, instead of the Lepi- 

 dosaphes group, this view being based on the characters of the 

 pygidium, such as the absence of a median pair of gland spines and 

 the presence of a double pair of setae dorsally near each median 

 lobe, and on the character of the male scale, this being a felted sac 

 of the type found in Ghionaspis but without traces of dorsal carinae, 

 and not similar to that of the female in the sense in which this is 

 true of the male scale of Lepidosaphes. As will be noted, the present 

 interpretation of the pygidial marginal structures differs quite mate- 

 rially from that of Leonardi. 



Genus ALLANTOMYTILUS Leonardi. 



Plate 6, fig. 3. 



Genotype. — Mytilaspis Tnaideni Maskell. 



Reference.— FG^vii2i\di, Cat. Cocc. World, 1903, pp. 304, 311. 



Only the type species has ever been placed in this subgenus which 

 was first erected by Leonardi in 1897 wholly on the basis of the 

 strongly transversely corrugated covering scale of the female, and 

 which appears to have been abandoned completely by him subse- 

 quently, as no other reference to it on his part has been located, not 

 even in his Monograph of the genus '"'' Mytilaf^pls.'^'' 



The Maskell collection contains three slides of this species, one of 

 " adult female, 1896," one of " male, 1896,'' and one of " $ and 9 

 puparia." There is also a small quantity of unmounted material 

 under No. 520, while the National Collection of Coccidae contains a 

 quantity of material from the type lot, received from Mr. W. W. 

 Froggatt. 



Adult female. — Scale as described by Maskell ; body short mytil- 

 aspiform, broadest behind the middle, the cephalothoracic region 

 somewhat chitinized, the abdomen membranous except the pygidium ; 

 antennae represented by a circle with three setae ; anterior spiracles 

 with two to seven pores, posterior without pores ; thoracic and abdo- 

 minal segments at and near margin ventrally with clusters of rather 

 numerous tubular ducts, cephalothorax with occasional small setae; 



