1904.] 231 



in nearly straight lines. Thorax clothed above with fulvous-grey hairs, beneath 

 with white, wings hyaline, nervures brown-black, propodeal area finely retieulate, 

 its apex raised, and rather shining and rounded ; abdomen sparingly clothed 

 with short white hairs, the basal segment more shining and less closely punctured 

 than the rest, beneath nearly naked ; stipites of the armature with a long, pointed, 

 beautifully fringed ribbon-like appendage, bent back under tlie organ. 



Long., 7 mm. 

 I have great doubts as to the distinctness of this c? fi'om a/cerfo, Vachal, but its 

 larger size, black tarsi, rounded propodeuni,&c.,seem to distinguish it satisfactorily ; 

 at the same time there is such a general reseniblaneo in the shape of the face, &c., 

 that one cannot but suspect that they may prove to be forms of the same species. 



16. Halicttis l^tus, Brulie. 3 ? , Giiimar, 22.iii.0t, on annual species of 



Euphorlia. 



17. Halictus dubius, sp. nov. 



J aide eJongatus, viridis, nitidus, ahdomine, cupreo micante, clypei apice, 

 hihro, mandibulift, antennis suhtits, tihiis unteriorihus antice, tarsisqtte omni- 

 bus pallide testaceis. Capite opacu, punctulissimo. Thorace nitido remote 

 punctafo, area propodeali magna, minute ruguluxa, a/uhmine punctuluto 

 subtus glabra. 



(J . ^hining, sparis^gly clothed with whitish erect hairs, head and thorax bright 

 bronzy-green, the face more golden, abdomen eoppery-bronze colour, apex of clypeus, 

 labrum, mandibles, antennte beneath, anterior tibiae in front, and all the tarsi pale 

 testaceous, and all the tibioe narrowly testaceous at the base. 



Head exceedingly densely punctured, dull, face much constricted in front, 

 clothed with short white hairs, in form much like that of morio, but with the 

 clypeus rather more exserted. Antennffi black above, very long, reaching to beyond 

 the base of the abdomen ; mesonotum and scutellum shining and polished, with a 

 very fine, remote, and irregular puncturation, mesoplenree less shining, and more 

 largely punctured, propodeum with rather a large basal area, which has its sides 

 converging in nearly straight lines to a subtruncate apex, the angles of which are 

 widely rounded, its surface is finely rugulose, the rugulosities arranged more or less 

 diagonally ; the area is bounded posteriorly by a slight verj' shining elevation, sides 

 and apex more or less dull and punctured. Wings hyaline, nervures dark brown. 

 Abdomen very elongate, clothed with an evidently very deciduous, exceedingly short, 

 white pubescence, which tends to form a basal band on the 2nd segment, finely and 

 ratlier closely punctured, the basal segment less so, beneath almost glabrous, apices 

 of the segments simple, stipites of armature with a narrow rellexed ribbon-like 

 appendage, as in many of the species of the genus. Long., 7 — 8 mm. 



5 (J , Giiimar, 22.iii.04, on annual species of Euphorbia ; 4 <J , Santa Cruz, near 

 La Cuesta, from 800 to 1000 ft. alt., visiting Rapistrum rugosum, L. 



I have recorded the characters of this $ under a name simply so that it miglit 

 be recognised, as I think it will prove to be the g of hvlux, Drulle, the females of 

 which occurred with it; the close puncturation of the head resembles that of 

 Uetus, but the thorax instead of being punctured like the head is polished, and 

 utterly unlike Ixtus, so that 1 dare not associate the two on the present evidence. 



