42.4 THE ZOOLOGIST. 
but it is impossible at present to know with certainty whether to 
place them in either Group I. or Group II. 
Grovp III. 
Micaria scintillus, Cambr.— ‘‘ The grassy slopes where this 
spider occurs (at Portland) are also numerously frequented by a 
large blackish ant, to which the spider bears so close a resem- 
blance that, even after much practice, it requires a close exami- 
nation to distinguish (before capture) between the ant and the 
spider ; both have also a similar habit of running hurriedly now 
and then up a grass-stem, as if to get a larger range of view— 
or it may be that both are in search of the same prey; both, 
again, on the first inkling of danger, betake themselves to the 
shelter of the tangled grass, and to the stems and roots of other 
low herbage” (Cambridge). -It will be observed that this spider 
exhibits both active mimicry (similarity of movements) and 
passive mimicry (similarity of form). I have seen it running 
about with F’. rufibarbis var. fusco-rufibarbis at Whitsand Bay. 
Micaria pulicaria, Saund.—I took a specimen of this little 
spider in the runs of Lasius niger at Mickleham. It also very 
closely resembled the ants in colour and appearance. I have 
since taken it with the same ant at Woking, as well as with 
FF’. sanguinea. 
Salticus formicarius, Deg. — In August last I took a male and 
two females of this very ant-like spider at Sandown, Isle of 
Wight. ‘They were all running about in company with speci- 
mens of Myrmica scabrinodis at the roots of some Lotus major at 
the foot of the cliffs. In life they bore the closest resemblance 
to the ants. Father Wasmann generally found this species in 
the neighbourhood of Formica rufa, F’. rufibarbis, and Myrmica 
levinodis in Holland. 
Diblemma donisthorpet, Cambr.—This new genus and species 
has been described by Mr. Cambridge from specimens taken by 
me in Kew Gardens, where I found it in some numbers last 
February and March. I discovered it in company with the little 
introduced ant, Wasmannia auro-punctata, to which, on account 
of its colour, size, and shape, it bears a strong superficial 
resemblance. The ant is abundant in the propagating pits, and 
nests in and under flower-pots, &c. The flower pots rest on beds 
