8 Mr. W. S. Dallas's Notice 



angles considerably produced but not acute. Scutellum pitchy 

 brown, pilose. Elytra brown, obscure; membrane blackish brown, 

 wrinkled, with a brassy reflection. Margins of the abdomen 

 projecting beyond the elytra on each side, pitchy red, with the 

 posterior margin of each segment narrowly edged with red. 

 Abdomen beneath bright red, smooth, impunctate, with a sharp 

 longitudinal central keel on all the segments except the two basal 

 ones. Breast dull red, pitchy in the centre. Head beneath 

 pitchy; rostrum pitchy red. Antennae black. Thighs and coxae 

 pitchy, the anterior thighs thicker than the others, the posterior 

 longest. Anterior tibiae orange red, the four posterior brownish 

 red. Tarsi orange. 



The entire surface, above and beneath, is clothed with short 

 yellow hairs, especially the abdomen and breast, and the under 

 surface of the anterior and intermediate thighs and tibiae. 



The only specimen of this insect in the collection is deformed 

 in the thorax, the left lateral angle being, as it were, crushed 

 forwards ; I have, however, figured it with both angles alike. 



The third is a small species of Arilus. 



Sp. 5. Arilus nigricollis. (PI. II. fig. 5.) 



A. capite, thoracis lobo antico, scutello, pectore, antennis, pedi- 

 busque nigris ; thoracis lobo postico flavo, abdomine rufo. $ . 

 Long. lin. 7 (15 mill.) 



Head black, smooth, impunctate, with a few fine hairs on the 

 sides ; a deep, transverse, impressed line across the disc at the 

 posterior margin of the eyes, immediately behind which are placed 

 the ocelli, inserted on two tubercles. Thorax hexagonal, with 

 the antero-lateral margins longest, and nearly straight, the con- 

 striction between the lobes being very faint ; the anterior lobe 

 small, black, with two obtuse tubercles in the centre, separated by 

 a longitudinal furrow, and which are again slightly notched trans- 

 versely at their apices ; the posterior lobe large, yellow, smooth, 

 impunctate and slightly shining, rather convex, with a slight 

 circular depression in the centre ; lateral angles somewhat promi- 

 nent, separated from the central portion by a strong depression. 

 Scutellum black, slightly shining, with a raised line at the apex. 

 Elytra brownish testaceous ; the coriaceous portion indistinctly 

 punctured, the membrane semitransparent. Abdomen projecting 

 slightly beyond the elytra on each side, with the margins bright 

 red ; beneath convex, bright red, shining, impunctate. Breast 

 black, impunctate, smooth, but more or less clothed with short 



