Myc.etceina.} CLAVICORNIA. 179 



MYCETJEINA. 



This tribe comprises a number of small or very small insects which 

 may be known by having the third joint of the tarsi quite distinct and 

 not concealed ; some of the species are oblong or oblong-oval, and some 

 almost hemispherical ; by some authors the genus Myrmecoxenus is 

 included in the tribe ; there are three British genera, which may be 

 divided as follows : 



I. Form oblong or oblong-oval. 



5. Antennae 10-jointed ; thorax with a strong impressed line 



on each side extending from base to beyond middle . . . SYMBIOTES, Redt. 



ii. Antennae 11-jointed ; thorax with a curved longitudinal 



line on each side extending from base to apex MYCET.EA, StepJt. 



II. Form rounded, subhemispherical ALEXIA, Steph. 



SYMBIOTES, Redtenbacher. 



This genus contains about half a dozen species from Europe, the 

 Canary Islands and South America ; they bear a superficial resemblance 

 to Cryptopliagus, but may be easily recognized by the sculpture of the 

 thorax. 



S. latus, Redt. (rubiginosus, Heer.). Oblong-ovate, broad, ferru- 

 ginous or reddish-brown with the thorax often lighter, shiny ; antennso 

 rather long, reddish-testaceous, with a distinct three-jointed club, the 

 first joint of which is as broad as the second ; head rather small, eyes 

 black ; thorax twice as broad as long, about as broad in front as behind, 

 very finely punctured, with a strong longitudinal impression on each 

 side, reaching from base to beyond middle ; elytra finely pubescent, 

 with fine punctured striie, interstices smooth, legs reddish-testaceous. 

 L. \\ mm. 



In rotten stumps, &c. ; rare ; Richmond Park, Surrey (Champion) ; Reigate Hill 

 (Saunders) ; Claygate, in fungus on. elm stump (Power) ; Clifton near Bristol 

 (Gorham) ; Bungay, Suffolk (Garneys) ; in May, 1883, I took a series in an old 

 stump at Nocton near Lincoln. 



IVIYCETJEA, Stephens. 



This genus contains one European species, and another has been de- 

 scribed from the Cape of Good Hope ; they are smaller, more oval, and 

 more coarsely punctured than Symblotes, and the thorax is differently 

 sculptured. 



TtL. hirta. Marsh (subterranea, F. villosa, Beck.). Oblong-ovate, 

 convex, narrowed towards apex, shining, clothed with pale coarse, some- 

 what setose, pubescence ; colour lighter or darker ferruginous or reddish- 

 brown ; head small ; antennae with a distinct three-jointed club, of 

 which the first joint is evidently narrower than the second; thorax 



N 2 



