OQO [October, 



18. Halictus, 11. sp. ?. 2 ? , Forest of La Mina, alt. 2700—2800 ft., 7 and 9.iT.04, 



visiting Paronychia ; closely allied to morio, but with wider apex to propo- 

 deum, and slightly different in puncturation, without seeing a ^ I refrain 

 from describing it. 



19. Halictus arctifbons, E. Saund. 1 ?, Puerto Orotava, ll.iii.04; 1 ?, 



Giiimar, 22.iii.04, on annual species of Euphorbia. 



20. Andbena bipaetita, Brull^. 2 «? , 1 ? , Santa Cruz, near La Cuester, 800 — 



1000 ft. alt. ; 4i.v.0i, visiting Echiiim ; I S , Santa Cruz, near a quarry in 

 the precincts of the Coaling Co.'s Works, 28.iii.04. 



Mr. Eaton has taken 3 <? <? with a ? of this Andrena at Santa Cruz, which 

 evidently belong to the same species, but they show no signs of the testaceous 

 coloration of the Ist and 2nd segments; as I have never seen any description of 

 the (? , I give here its principal characteristics. 



Head and thorax clothed above with ochreous, beneath and at the sides with 

 whitish hairs. Antennae with the joints pale beneath, from the 3rd inclusive, much 

 swollen on the lower side, each joint about as long as its greatest width ; 2nd joint 

 about equal in length to the following, labrum in fresh examples with three distinct 

 patches of pale liairs, that in the centre arising from a fovea, palpi annulated with 

 white. Thorax finely punctured, its surface dull and rugulose. Wings hyaline, 

 nervures pale testaceous, propodeum with fine rugosities at the base centrally. Legs 

 clothed with long white hairs ; posterior tarsi entirely, and anterior and inter- 

 mediate tarsi from the 2nd joint, testaceous. Abdomen finely rugulose, basal seg- 

 ment finely, distinctly, and rather remotely punctured, the rest more finely and 

 closely so, the puncturation becoming indefinite on the 4th and following, 2nd, 3rd, 

 4th, and 5th segments widely impressed at the apex, and with a band of pale 

 whitish hairs, apical fimbria brown, the basal segment is clothed with long pale 

 hairs, the 2nd with shorter ones, the segments beneath are fimbriated with pale 

 hairs at the apex ; 8th abdominal segment viewed laterally with a raised tooth 

 before the apex, which latter bears a tuft of pale hairs, and the whole apical portion 

 of the segment beyond the tooth is clothed with velvety pubescence, armature with 

 very strong teeth at the base of the stipites, the apices testaceous and elongate, 

 sagittae testaceous, about as long as the stipites. 



21. Andbena minutfla, Kirb. ?. c? , 2 ? , Cruz de Afur, alt. 3100—3230, 



5.iv.04 ; 1 9 ! stylopized. 

 This is probably a form of mimttula Cparvida), with longer black hairs on the 

 head and thorax, and more pronounced rugosities on the abdomen, especially in 

 the S ■ 



22. DioxTS atlantica, sp. nov. 



Nigra, tridentatae affinis, valde punctata, scutelli dentibus suhrectangu- 

 laribus, abdominis segmentis 1 — 2, maris, 1 — 'i,femincB, stria laterali alho- 

 puhescente ornatis — valvula dorsali rotundata. 



Kesenibling a small tridentata in general appearance ; entirely black in both 

 sexes, 1st, 2nd, and 3rd abdominal segments in the (J, and 1st, 2nd, and 3rd in the 



