different form ; the labium is longer and not deeply notched, 

 and the joints of the labial palpi appear to be differently pro- 

 portioned. It must however be remembered that there are 

 numerous modifications in this genus; in some species the 

 antennas are much shorter than the body, in others longer 

 and capillary : the petiole varies much in the length, and is 

 often considerably dilated at the apex ; the abdomen is more 

 or less clavate, the ovipositor rarely visible from above; the 

 areolet is frequently trigonate and sometimes wanting, and the 

 hinder legs are rarely thickened. 



1 shall give Gravenhorst's sections, although perhaps much 

 more natural ones might be obtained from the proportions of 

 the petiole, if not from the areolet and the metathorax. 



1 . Scutellum and abdomen black. 

 7^. ventralis Ctiri. Male -. Antennse shorter than the body : areolet 

 small trigonate petiolated: black silky sliining: trophi, 2 spots on the face, 



2 basal joints of antennte beneath, scapulce and legs yellow; coxae black, 

 trochanters spotted with black, thighs and tibiaj ochreous, hinder thighs 

 and inside of tibiae at the apex piceous as well as the tarsi except at their 

 base, anterior tarsi with the apex and base of each joint dusky; abdo- 

 men sublinear, yellow beneath except at the base and apex, 2 dots at the 

 base of the 2nd and 3rd segments as well as the margin of the latter 

 pellucid ferruginous. 4^ lines long. 



2. Scutellum with a pale spot ; segments frequently with pale 



margins. 

 10^. gracilipes Curt. Antennje slender, longer than the body: areolet 

 oblique-ovate : testaceous, slender, head black, face trophi and scapulars 

 yellow, a spot on each side of the collar and scutel and also the meta- 

 thorax brown : abdomen subfusiform and ferruginous, petiole black, 2nd 

 segment and sides of the following piceous : tips of hinder thighs and 

 tibiae and of all the tarsi brown. 3 lines, 

 I took a male near Lanark in September. 



3. Scutellum pale or rufous ; abdomen entirely nfous, or red 



and black. 

 23^. speciosus Curt. Antennse much longer than the body: areolet none: 

 black, 2 basal joints of antennae beneath, face, trophi, underside of thorax, 

 legs, scapvilse, margin of collar, 2 hooked streaks on the thorax and scutel 

 excepting the tip bright yellow; metathorax with a foveolet at the base: 

 abdomen ovate-clavate, ferruginous, petiole black, broad at the apex, 

 hinder legsfen-uginous, coxs and trochanters yellow, hinder tibiae brown, 

 their apex and tarsi black. 3^ lines. 



A male found in Coomb-wood the 7th of May. 



4. Scutellum black; abdomen rifous or red and black. 

 57''. Waltoni Curt. Brit. Ent. pl.6\<^S- This insect is re- 

 markable for its curious antennte, which resemble the ver- 

 tebrae of some reptiles, and the areolet is exceedingly minute. 

 I have the pleasure of dedicating this new species to my 

 friend John Walton, Esq., to whose exertions this work is 

 greatly indebted for many of the rare and beautiful plants that 

 have ornamented the recent volumes : three specimens were 

 taken by the river Nidd at Knaresborough in June, and also 

 in the neighbourhood of Settle in Yorkshire. 

 The Plant is Dryas octopetala, Mountain Avens, from Arncliff. 



