New Species of Scale Insects. 389 



Eggs. — The eggs are pale yellow and ovate. 



Young. — The newly hatched larva is pale yellow and 

 elongate-oval in outline. Antennae apparently five- 

 jointed, last joint longest. Legs lighter than body. 



Mature male. — The mature male is bright or lemon- 

 yellow in general color. The thorax is dark or brown- 

 ish on the dorsum; head about the same color; neck 

 lighter. Antennae rather brownish, with thick clusters 

 of hairs. Front and median tibiae brownish. Tarsi oi 

 hind legs dark, about the same color as fore tibiae. 

 Hind tibiae with a dark baud at base. Length about .65 

 mm.; style about .42 mm. 



Mature female. — The body of the female is ovate, 

 sometimes nearly circular (Plate XXXIL, Fig. 4), lemon- 

 yellow in color, with the last segment (Plate XXXIL, 

 Fig. 5) brownish or amber, and presenting the follow- 

 ing characters: 



There are no groups of spinnerets, so far as I have 

 been able to determine from a large series of balsam 

 mounts. There is a curious, pretty constant group 

 of club-shaped organs, as shown in the illustration. 

 There is only one pair of lobes. They are very promi- 

 nent, about as wide as long, notched on each side, 

 and more or less rounded. The body wall is thickened 

 for a considerable distance laterad of the lobes, usually 

 to the last plate. Plates distinct, about as long as the 

 lobes ; two laterad of the lobes, between the first and 

 second spines, the one next to the second spine usually 

 forked ; four, as a rule, between the second and third 

 spines, the one next the third spine usually forked and 

 longest, and three, all simple, laterad of the third spine. 

 Spines distinct; first pair on the lateral margin of the 

 base of the lobes; the second and third just laterad of 

 the incisions. Anal opening a httle more than twice as 

 distant from the base of the lobes as the lobes are long. 



Found by the author on the trunk of a white elm, 

 Uhnus americana, on the University campus, at Urbana, 

 llhnois. Not common. 



