4.58 ABNORMAL COLEOPTERA. [ Hlenchus. 
very narrow; the wings are broader than their length measured from the 
pseudelytra to apex of abdomen, and have scarcely any visible nervures ; 
the posterior trochanters are short and the tarsi are two-jointed ; two 
species are known, one from Mauritius and one which has occurred in 
Britain. 
E. tenuicornis, Kirby (Walkeri, Curt.), Dull ochreous-fuscous ; 
eyes black and shining scarcely pedunculate; wings iridescent, pale 
fuscous, with the anterior margin considerably thickened and darker 
fuscous ; the few nervures are also fuscous ; abdomen more or less spotted 
above and beneath; legs and antenne pubescent ; thorax shorter and 
more gibbose than in Stylops, as well as the postscutellum; tarsi two- 
jointed (at all events apparently) much more slender in the first pair than 
in the others. L. 1 mm. 
By sweeping herbage; parasitic on Bombus and perhaps on Andrena and Havictus ; 
extremely rare; Southgate, near London (Walker) ; Glanvilles Wootton (very rare ; 
a couple only taken by Mr. Dale, on Whitedown, June 11th, 1830, and in Aldermead, 
June 27th, 1839) ; Ireland, Belfast (Templeton) ; the latter specimen is now in the 
University Museum, Oxford, 
HALICTOPHAGUWS, Dale. 
Tn this very curious genus the antenne are short and seven-jointed and 
flabellate, the tarsal and second joint being stout, and each of the 
remainder being produced into a lobe on the outer side, the lobes 
gradually decreasing in length to the apical joint, which is inserted at 
the base of the lobe of the penultimate joint ; the lobes are submem- 
branous and are ornamented with semitransparent punctures; the eyes 
are prominent and strongly granulate; the pseudelytra are strongly 
clavate and very slender at base ; the abdomen is rather short and is in 
great measure concealed by the postscutellum, which has a long deep 
furrow at base; the wings are broad with rather strong nervures; the 
anterior coxe are long, the femora rather short, the tibie short and 
compressed, and the tarsi three-jointed ; one species only appears to be 
known. 
H. Curtisii, Dale. Black and slightly glossy, clothed with a brown 
velvety pubescence ; antennz and legs dull brownish ochre; wings 
slightly tinged with brownish ochre and obscurely iridescent ; nervures 
brown, broad and strongly marked ; wings less rounded than in Elenchus, 
broader in front and narrowed behind; tips of the joints of the tarsi 
and apex of abdomen ochreous. L. 1 mm. 
Parasitic on species of Halictus; very rare; taken by Mr. Dale in August in 
company with the male of Halictus eratus(?) by brushing some long coarse grass 
and thistles close to the sea, on a rock called Durdle Door at Lulworth Cove; Mr. 
Dale also recorded the fact of his having found a larva in Halictus? 4 guttatus taken 
in the New Forest in April; a number of Halicti infested with apterous Strepsip- 
terous females were once found by Sir 8. 8. Saunders near Folkestone; these very 
likely belonged to the present species, but no male was discovered. 
