54 Rev, T, A. Marshall's inonograph of 



the 1st joint in the ? subincrassated, as long as the three following 

 joints. Radius originating somewhat beyond the middle of the 

 stigma; recurrent nervure interstitial; prte- and pobrachial ner- 

 vures more approximated than usual. Terebra subelevated. 



(2) 1. Second abscissa of the radius twice as long as 

 the first ; stigma incrassated ; colour uni- 

 form, i^itchy-black . . . . . . . . 2. indagator, Hal. 



(1) 2. Second abscissa of the radius about 4 times 

 longer than the first ; stigma attenuated ; 

 colour pitchy, partly testaceous . . . . 1. clavator, Hal. 



1. Rliyssalus clavator, Hal. 



Rlii/ssalns clavator, Hal., Ent. Mag., iv., 53, <? ? . 



Piceous ; anterior half of the abdomen, antennae at the base, and 

 legs, testaceous; stigma fulvescent, attenuated; hind tibiae of the 

 (J clavate, fuscous ; terebra as long as the body without the head. 

 Length, 1 — If ; wings, 2 — 3| lin. 



Antennte ? 25 — 2G-jointed, hardly longer than the body. Meso- 

 thoracic sutures punctulate, meeting in a rugulose fovea. Medial 

 area of the metathorax extending to the base. Abdomen deltoid, 

 compressed, truncate at the apex ; segment 1 stouter than that of 

 the (^ ; 2,3, and 4 at the base, fulvescent ; the rest fuscous except 

 the two last, which are ferruginous. Femora subclavate. Winga 

 subhyaline, narrower than in the other species ; stigma attenuated ; 

 2d cubital areolet differently shaped, the side formed by the 2d 

 abscissa of the radius being equal in length to the first intercubital 

 nervure ; pobrachial areolet of the hind wing scarcely longer than 

 ^ of the praebrachial. 



Antennae ^ 25 — 33-jointed (in my specimen 27-jointed), half as 

 long again as the body. Abdomen spathuliform, depressed ; 1st 

 segment three times longer than broad, the tubercles placed before 

 the middle, shining, rugulose, the margins raised, and defined 

 interiorly by an impressed line, testaceous ; the rest piceous, 

 becoming darker towards the apex. Clavate hind tibioB fuscous 

 except at the base. 



I have taken both sexes at BarnstajDle, but only the 

 S- now remains. 



2. Rhyssalus indagator, Hal. (PL I., fig. G). 

 Ehyssalus indagator, Hal., Ent. Mag., iv., 54, <? ? . 

 Exothecus tuhcrculatus, Wesm., Nouv. Mem. Ac. Brux., 



1838, p. 82, a^ ? . 

 Pitchy-black ; legs testaceous, hind femora (and in the <? the 

 clavate hind tibiae) fuscous, except at the base ; terebra as in the 

 preceding. Length, 1^ — 2 ; wings, 3|— 3| lin. 



