ABT. liJ. MASKELL GENERA OF COCO [DAE MOKKISON. 99 



two ver}^ small, close together between these, one larger on each side 

 near and below the base of the large apical seta, and two more, small, 

 above each apical seta; each margin of each of at least the abdominal 

 segments with three small setae, one above the other, of which the 

 median is the longest, anal ring small, circular, somewhat invagi- 

 nated, placed near the apex of the abdomen ; body with dorsal and 

 Tentral rows of small setae, one on each half, as shown. 



Cotype.—Q^t. No. 24776, U.S.N.M. 



The following generic diagnosis has been based on the preceding 

 description. 



GENERIC DIAGNOSIS OF PHAULOMYTILTJS. 



Diaspine forms of uncertain affinities, superficially resembling 

 Lefldosofplies ; the secreted covering mytilaspiform, adult female 

 with elongate body, somewhat chitinized cephalothorax, very small 

 antennae with three setae, spiracles with or without pores, these never 

 numerous, abdominal segments with groups of tubular ducts and 

 short slender gland spines with greatly enlarged bases at margins, 

 pygidium with small triangular widely separated more or less pro- 

 jecting lobes, witliout gland spines or plates, marginal setae present, 

 approximately normal in arrangement, without incisions with thick- 

 ened edges, with slight incisions for marginal pores, without chiti- 

 nized paraphyses, anal ojDening oval, placed much nearer base than 

 apex of pygidium, paragenitals wanting, marginal ducts present, 

 large, axis longitudinal or approximately so, dorsal pores present, 

 fairly numerous, axis not uniform but approximately longitudinal, 

 pores not arranged in definite and conspicuous rows, without internal 

 pygidial thickenings except from base of lobes, with some ventral 

 microijores and surface setae ; intermediate stage similar to adult 

 but less developed; larva oval, antennae 5-segmented, terminal not 

 annulate, legs normal, apex of abdomen not chitinized, without traces 

 of lobes or gland spi.-cs. vvith a pair of long apical setae and other 

 small setae, anal ring small, circular, near apex of abdomen. 



As may be not«d from the preceding description, the writers con- 

 sider that Leonardi's interpretation of the triangular projecting 

 marginal structures is incorrect and that they are really poorly de- 

 veloped pygidial lobes, instead of gland spines. There is no evidence 

 that they are connected with internal ducts, as are the true gland 

 spines. The morphological modifications of the type species appear 

 to be quite sufficient to separate the genus widely from LepidosafJies^ 

 as represented by the type, L. ulmi (Linnaeus) and to establish it as 

 a unit of full generic rank. The writers are not able to say whether 

 or not the genus thus established is identical with any other described 



