340. 

 SITARIS HUMERALIS. 



Order Coleoptera. Fam. Cantharidae Lat. 



Type of the Genus, Necydalis humeralis Fah. 

 SiTARis Lat. — Cantharis Geoff., Oiiv. — Necydalis Fab., Forst., Don, 

 Marsh. 



Antennce inserted upon the anterior margin of the eyes, clothed 

 with very short hairs, longer than the head and thorax and rather 

 attenuated to the apex in the male, the apical joint being as long 

 as the 3d; shorter in the female and slightly thickened at the 

 apex, 11 -jointed, basal joint scarcely thicker than the following, 

 2d joint small, both somewhat chalice-shaped, 3d a little longer 

 than the 1st, the remainder nearly of equal length, elongate obo- 

 vate, slightly increasing in size, the apical joint being the largest 

 and ovate (6). 



Lahrum coriaceous, very pilose above, nearly semiorbicular (1). 

 Mandibles stout, very much hooked at the apex, with a long 

 fleshy lobe on the inside below the middle, ciliated on the inner 

 margin (2). 



Maxilla: small, bilobed, very pilose, internal lobe rounded at the 

 apex, external one longer larger and hatchet-shaped. Palpi long 

 and comparatively robust, 4-jointed, basal joint small, the others 

 of equal length, the 2d pyriform, 3d oblong, 4thsubovate fleshy 

 at the apex (3). 



Mentum coriaceous, pilose and oblong, anterior angles truncated 

 obliquely. Palpi attached to remote scapes, triarticulate, basal 

 joint minute, 2d the longest, pubescent and clavate, 3d the 

 largest subovate. Labium bilobed and very pilose (4). 

 Head injlexed semi-orbicular. Eyes sinall, lateral and reniform. 

 Thorax orbicular-quadrate. Scutellum large, notched at the apex. 

 Abdomen thick, sometimes large in the female. Elytra shorter than 

 the body, very much attenuated and divaricating towards the apex. 

 Wings ample and folded at the apex. Legs rather long and slender. 

 Thighs somewhat thick. Tibiae simple, hinder pair the longest, fur- 

 nished with very short spurs. Tarsi 5-jointed (5), posterior pair 4- 

 jointed, basal joint the longest, penultimate the shortest. Claws 

 curved and acute, each being furnished at the base with a strong 

 bristle (5-j- hind leg). 



Humeralis Oliv. t. 3. No. 46. pi. 2./. 20. Marsh. 359.— muralis 

 Forst. p. 48. 



Black, shining : head and thorax coarsely thickly but irregularly 

 punctured, the latter with a deep impression in the centre from 

 the middle to the base : elytra thickly and minutely punctured, 

 pale piceous with a violaceous tint, ochraceousat the base : wings 

 fuscous slightly iridescent. 



Obs. The outline figure exhibits a female in profile of the natural 

 size, the male is slightly magnified. 



In the British Museum and other Cabinets. 



