1906.] 



31 



Fia. 10. — Hind tibia and metatarsus of 



(a). Croesus septentrionalis, L., ? 

 (b). llolcocneme crassa, Fall., ? . 

 (c). rteronus miliaris, Pz., ? . 

 (c^) . Croesus latipes, ^ . 



MiCSONEMATUS, KoDOW. 



Another genus wLich is easily separated from the rest is Micro- 

 nematus. I know only one British species, viz., monogynicE^ Htg. 

 This is an excessively small insect (2 to 8 mm. long), black, except 

 that the legs are partly white, with a broad ovate abdomen, emar- 

 ginate clypeus, claws armed with subapical tooth (not bifid), short 

 pilose saw-sheath ( $ ), and short filiform antennae {i. e., they do not 

 taper towards the apex as they manifestly do in the vast majority of 

 the Nematids). Mr. Cameron's description of his N. hihernicus 

 seems to suit this insect, but the absence or faintness wliicb he notes 

 of the 1st cubital n. is not a constant character. I have specimens 

 both with and without it. (See Cam., vol. iv, p. 191). On the whole 

 I believe that hihernicus, C, is a Micronematus monogynice, Htg., like 

 my own specimens, and that his crassispina {nee Thoms.) is probably 

 the same, although in vol. iv he classes it as a Fontania, which it can 

 hardly be if its saw-sheath is " not projecting beyond apex of abdo- 

 men." Neither in hihernicus nor crassispina does Mr. Cameron men- 

 tion the claw characters ; and though he tells us in Vol. iv that the 

 former is not a Micronematus, he does not enumerate it under any of 

 the other genera. I have taken monogynice at Box Hill in early spring 

 at Prunus spinosus flowers, and the late Mr. Beaumont often sent me 

 specimens of it. The stigma is unicolorous, and dusky, or even 

 black in fresh specimens, but seems to fade after death. 



Cetptocampus, Hartig. 

 Returning to Cryptocampus, of which, as of Micronematus, the 

 species are small and black-bodied on the whole, but in which the 



