TRIBE LEPIDOSAPHINI 271 



wax mixed with them are located under the caudal portion of the 

 scale. In the adult female the body is elongate, typically about twice 

 as long as broad, but in Ischnaspis it may be over four times as 

 long as broad. The cephalic end is usually truncate or bluntly 

 rounded. The antennae are represented by unsegmented tuber- 

 cles, each bearing one or two long setae. The segmentation of the 

 body is ordinarily distinguishable, but obscure. In Opuntiaspis 

 and Mytilella the mesocoria is deep, particularly at each lateral 

 margin, and the body appears to be divided into two portions. 

 The segmentation of the preabdomen is usually distinct and 

 sharply marked, particularly at each lateral margin. The caudo- 

 lateral angles of these segments are frequently produced as 

 rounded lobes and in some cases the lobes are prolonged and their 

 lateral margins are strongly dentate so that each resembles a claw. 



The division between the preabdomen and pygidium is gen- 

 erally distinct. The pygidial fringe is usually quite typical in 

 form. There are generally two or three pairs of lobes, although 

 there may be only a single pair, and in rare cases none at all. In 

 a few species there are four pairs of lobes present, but the fourth 

 pair is small and rudimentary. One or more of the pairs of lobes 

 cephalad of the median pair is frequently deeply incised or com- 

 pletely divided. In the tables it is simply said to be incised. 

 The second pair of lobes is usually incised only once, forming 

 two lobelets, but the third pair while often incised only once may 

 be incised several times in certain species. Each of these lobe- 

 lets are frequently incorrectly designated and numbered as dis- 

 tinct lobes. Some species with only three pairs of lobes are said 

 in such cases to have five or seven pairs. The margins of the 

 lobes are usually notched, particularly the median lobes, and 

 usually on both the mesal and lateral margins. The number of 

 notches may be reduced in size and increased in number until 

 their margins are crenulate or finely serrate. 



Pectinae, if present, are of the type -of furcapectinae and 

 even such reduced pectinae are of rare occurrence. The plates 

 are long, slender, and pointed. They are usually longer than the 

 lobes. The number varies somewhat, but is usually 2, 2, 2, 2 or 

 2, 2, 2-3, 6. The pair of plates in the median incisura are rarely 

 absent and some of the species referred here and lacking them, with 

 more study, will probably be found to belong to the Diaspidini. The 

 greatest variation in the number of plates is on the lateres which 

 may bear only a few or a considerable number. This region is 



