﻿449. 

 ISSUS COLEOPTRATUS. 



Order Homoptera. Fam. Cicadiidse. 



Type of the Genus, Issus coleoptratus Fab. 

 Issus Fab., Curt. — Cercopis Fab., Panz. — Cicada Geoff., Don. 



Antenna short, inserted under the eyes (4), composed of 4 joints, 

 1st and 2nd robust, the former somewhat cup-shaped, the latter 

 ovate-truncate and pubescent, 3rd minute, 4th a long seta (4 a). 

 Labrum short slender and acute (3). 



Mandibles and Maxillce dilated at the base, and terminated by- 

 very long setae, especially the latter (2, with the labium re- 

 moved). 



Labium shorter than the head, linear, triarticulate, 1st and 3rd 

 joints nearly of equal length, 2nd a little longer. 

 Head vertical, the crown short and truncated ; face long and triangular, 

 bent under the breast : eyes lateral globose and prominent, not 

 notched benealh: ocelli none? Thorax, anterior jwrtion short broad 

 and subirigo/iate ; scutellum kn-ge and triangular. Abdomen very 

 large and trigonate, being dilated at the base. Wings defiexed when 

 at rest ; superior coriaceous, as long as the body, subovate, the ex- 

 ternal margin jjroduced and having an angular appearance near the 

 base, with several lovgitudinal elevated nervnres, connected by nu- 

 merous transverse ones ; inferior wings smaller and membranous 

 coarsely reticulated. Legs moderately long. Tibise simple, ex- 

 cepting the posterior pair which are considerably the longest and 

 have a spine outside at the middle, and another nearer the apex, 

 which is serrated : tarsi short and triarticulate, basal joint the long- 

 est and serrated at the apex in the posterior pair, 2nd joint minute : 

 claws acute : pulviUi distinct (6t hind leg). 



Coleoptratus Fab. Ent. Syst. v. 4. p. 53. n. 26. — Panz. 2. 6. — 

 Curt. Guide, Gen. 1069. 1. — dilatatus Don. Brit. Ins. v. 4. pi. 

 138,/. 5. &6. 



In the Author s and other Cabinets. 



This insect varies so much in colour and markings, being 

 sometimes nearly of an uniform clay colour, at others the 

 elytra are dark with a paler band, that any one would at first 



