340 ADDENDA 



this species from Roydon, West Essex, in which the elytra are entirely 

 black ; this form is alluded to by Ganglbauer as very rarely found on 

 the continent (Col. Mitt. Europ ii. 800), but has not apparently bpen 

 named, and should be inserted in our lists as var. nigripennis. AVe 

 probably also possess the entirely light red form, or light red with dark 

 abdomen [nigrojiygialis Fairm.), although I have not seen a marked 

 example of this. 



Reichenbachia (Bryaxis) impressa, Panz. Favin. Germ. 89, 10, 

 var. unicolor, Collin's Ent. Mo. Mag. xlvii. (2 Ser. xxii.), 1911, 27G. 

 This variety has been mistaken for B. juncorum : it has occurred iu 

 Cheshire (Dutton) and at Yarnton, Oxon ; the difl'erence from the type 

 form is merely that of colour, the specimens differing from the type foi-m 

 in being uniformly reddish testaceous ; it is possible, as Mr. Collins hints, 

 that this is in part, if not entirely, due to immaturity. The variety is 

 not noticed by Ganglbauer or in the last European catalogue. 



If Bryaxis (Leach) (containing B. longicornis [sangidnea)a.i!\d. B. gigas) 

 is regarded as a separate genus, as seems correct, Reichenhachia (Leach 

 Zool. Journ. Lond. ii., 1826, 451) must be adopted for the other species 

 that formerly were included under Br>/axis : Saulcy's name, Ryhaxis, 

 cannot be allowed to stand. 



Claviger longicornis, Miill. Germ. Mag. iii. (85). This species 

 may be at once known from G. testaceus Preyssl., by its decidedly larger 

 size and broader build, and especially by the much narrower head and 

 more elongate antennae ; these latter are relatively long and slender, 

 with the terminal joint forming an abrupt club. 



Five examples of this much sought for species were taken by 

 Commander Walker in 190G in quarries near the river Cherwell, some 

 seven or eight miles north of Oxford, in nest of a small black ant ; they 

 were put away in a store box as C. testaceus, and only recently recog- 

 nised as another species. They were taken under flat pieces of oolitic 

 limestone of moderate size, none of them exceeding a foot square and 

 seven or eight pounds in weight. 



Mr. Donisthorpe says that the usual host of C. longicornis on the 

 continent is Zasius utnbratus Nyl, and that it is found most freely in 

 April in nests of this ant under large and deeply embedded stones. 



SILPHID.S:. 



Catops montivagus, Heer. (Faun, Col. Helv. i. 381). Tin's 

 insect is very closely allied to C. tristis, Panz., and is, in fact, regarded 

 as synonymous with it in the European catalogue of Heyden, Reitter 

 and Weise. It is, however, darker than C. tristis in colour, and may be 

 known by its longer and narrower throax, which is bisinuate at base, and 

 by its longer elytra. The first five joints of the antennte are rufo- 

 testaceous, the eighth the smallest, much narrower than the following, 

 the last shortly ovate, scarcely longer than the preceding ; the thorax 

 has the sides slightly rounded, and is very densely sculptured and 



