﻿COCCUS ACERIS. 



The Sycamore Scale-insect. 



OiiDER Homoptera. Fam. Coccidae. 



Type of the Genus, Coccus Cacti Linn. 



Coccus Linn., Fab., Lat., Curt. — Calymmata, Diaspis, Diaprosteci 

 Costa. 



Antennee of the male inserted in front of the face, before the 

 eyes, approximating, not so long as the body, stout, and linear, 

 composed of 10 joints, 2 basal joints short, 3rd longer obovate, 

 the following scarcely decreasing in length, the apical joint ob- 

 pyriform and slightly pilose (4) : very minute and remote in the 

 female ( $ a), tapering, composed of 3 short joints, the apical 

 one ovate, the apex furnished with a bristle. 

 Proboscis long and slender in the female, composed of 3 setsp, 

 attached to an oval fleshy base placed between the anterior 

 legs (2) : wanting in the male. 

 Male. Head trigonate (1) : eyes small, lateral and reticulated : ocelli ? 

 smaller and placed below the eyes (Ic). Thorax large suborbicular : 

 scutel semiovate. Abdomen short, with a short horny process at 

 the apex, and two setce twice the length of the insect arising from the 

 posterior angles. Elytra twice as long as the body, mealy, having 

 only 2 nervures : wings none. Legs short and stout (6) : thighs 

 and tibiae simple : tarsi consisting of an elongated joint, with a short 

 claw and 1 or 2 bristles at the apex. Female oval, fleshy and apte- 

 rous : eyes ? remote, minute. Thorax composed of 3 or 4 fleshy 

 rings closely uniting with the head and body, and forming more than 

 half the animal. Abdomen short, composed of 7 or 8 segments, 

 producing cottony scales at the apex. Legs very short and remote 

 ($/), 4-jointed, tapering, terminated by a single claw or bristle. 

 Larvae and females often living in a cottony substance on the leaves 

 and branches of trees. Pupse of the males inclosed in a cocoon. 

 L the larva of C. Cacti, the smaller flgure showing the natural size: 

 the antennae were 7 -jointed: eyes black, minute and placed behind 

 the antenna. 



AcERis Fab. — Curt. Guide, Gen. 1042. 2. 



Male. Castaneous : antennae pilose, 9-jointed, 2 basal joints 

 short, 3rd twice, 4th thrice as long, 5th shorter than the 2nd ; 

 remainder ovate, decreasing in length (4*) : eyes or ocelli ten, 

 5 on each side (1*). Thorax with a large membranous space 

 before and another behind the scutel, which is transverse-ovate. 

 Abdomen short and truncated, with a long stout spine at the 

 apex and a fine white seta on each side, thrice as long as the 

 animal : elytra long and broad, iridescent, yellowish with the 

 subcostal nervure broad and ochreous, castaneous at the apex 

 where the colour sjoreads to the costa : legs and telum ochreous, 

 the former more or less brown. Female as large as that of 

 C. Cacti, but of a duller red colour. 



In the Author s and other Cabinets. 



