Oh'gofa.] STAPHYLTNID.E 173 



A. Form narrower and more linear ; elytra shorter in 



proportion to thorax 0. PUSILLIMA, Grav. 



B. Form broader; elytra longer in proportion to 

 thorax. 



a. Size smaller ; antennse pitchy red with apex 



darker 0. atomakta, Er. 



b. Size larger; antennae entirely red O. punctulata, Hear 



(ruficornis, Sharp) . 



II. Hind body bi'oad, moderately contracted at apex; club 



of antenna 4-jointed ; form broader O. ghanaeia, Er. 



III. Hind body short, very strongly narrowed to apex. 



i. Club of antenn£B abrupt, 3-jointed ; apex of hind 



body black O. fl.wicoknis, iac. 



ii. Club of antennae gradual, 5-jointed; apex of hind 



body broadly yellow 0. apicata, Er. 



O. inflata, Mann. Black, rather sliining, with the elytra more or 

 less distinctly reddish brown, and the apex of hind body reddish testaceous; 

 head plainly narrower than thorax, antennae nearly as long as head and 

 thorax together, testaceous with apex fuscous, third joint shorter and 

 narrower than second, eighth to eleventh joints forming a gradual club; 

 thorax nearly twice as broad as long, about as broad at base as elytra, 

 finely and thickly punctured ; elytra evidently longer and less closely 

 punctured than thorax ; hind body parallel-sided very thickly and uni- 

 formly punctured, with the sixth segment evidently longer than the 

 fifth ; legs testaceous, L. 1 mm. 



^o"- 



In haystack refuse, &c. ; not uncommon ; Birch Wood, Darenth Wood, Sheerness, 

 Croydon, Shirley, Tonbridge ; Glanvilles Wotton (abundant under fir trees) ; Hast- 

 ings; Exeter; Birmingham district; Repton ; Scarborough; Manchester; North- 

 umberland district ; Scotland, rare, Solway and Tweed districts only ; Ireland, 

 Dublin, and near Waterford. 



O. parva, Kr. {pygmcea, Kr. olim). Distinguished from the preced- 

 ing by its smaller size and narrower form, and the three-jointed club of 

 the antennae ; from 0. 2^usillima it may be separated by its reddish 

 brown elytra, and the bright yellow^ terminal segments of the hind body ; 

 it is smaller than 0. atornaria, and differs from it, among other things, 

 in having the legs entirely pale; the sixth segment of hind body is more 

 developed than in any of the following species in this section. L. f mm. 



In cut grass, haystack refuse, &c., rare; Shirley, near Croydon; Edinburgh (?). 



O. pusillima, Grav. This species may be separated from all its 

 allies by its narrow and somewhat linear form, and by having the elytra 

 shorter in comparison wath the thorax ; it is about the size of 0. parva, 

 but has the sixth segment of hind body shorter than in that species; the 

 apex of hind body is obscure or brownish instead of bright yelloAv, and 

 the punctuation of the upper surface is rather less fine; the colour is 

 variable, being either pitchy black with the apex of hind body reddish, or 

 with tbe elytra chestnut brown, or entirely reddish with the liead and 

 part of hind ])ody pitchy. L. | mm. 



