42 MB. smith's catalogue of hymenopterous insects 



Catalogue of the Hyinenopterous Insects collected at Sarawak, 

 Borneo ; Mount Ophir, Malacca ; and at Singapore, by A. B. 

 Wallace. By Frederick Smith, Assistant in the Zoological 

 Department in the British Museum. Communicated by 

 W. W. Saunders, Esq., F.B.S., F.L.S. 



[Read June 16th, 1857.] 



Bam. ANDBENID.E, Leach. 



Gen. Halictus, Latr. 



1. Halictus ceratinus. H. niger; alis hyalinis ; abilomine clavato. 

 Male. Length 3^ lines. Black : the head closely and finely punctured ; 



antenna; as long as the thorax, the flagellum obscurely testaceous 

 beneath ; the face covered with griseous pubescence ; the mandibles 

 ferruginous at their apex. Thorax closely punctured ; the wings hyaline 

 and iridescent, their apex slightly clouded ; the nervines and tegulae 

 testaceous ; the legs rufo-testaceous, the tarsi paler, and covered with 

 pale glittering pubescence. Abdomen clavate; the apical margins 

 of the segments with fascia; of short white pubescence, frequently 

 more or less obliterated ; shining and delicately punctured ; beneath, 

 the apex of the third segment, and the fourth, entirely clothed with 

 very short whitish pubescence; the abdomen is of a dark rufo-testaceous 

 hue, palest beneath, varying in different individuals. 



Hab. Borneo (Sarawak). 



This remarkable form of Halictus occurs at Sierra Leone. I have de- 

 scribed a species from that locality, the " H. clavatus;" it is a smaller 

 and very distinct species from H. ceratinus ; in this species the first re- 

 current nervure is received in the middle of the second submarginal cell. 



2. Halictus vagans. H. ater, cinereo-pubescens ; abdomine nitido, 

 segmentis intermediis basi fascia albis. 



Female. Length A\ lines. Black : the clypeus produced, the face covered 

 with cinereous pubescence. Thorax closely punctured above ; the 

 mesothorax thinly covered with short erect pale pubescence ; the post- 

 scutellum with a dense short downy pubescence; the metathorax 

 truncated, and having some irregular coarse stria; at the base above ; 

 the wings hyaline and iridescent, the nervures and tegula: testaceous ; 

 the legs with a short yellowish-white downy pubescence. Abdomen 

 delicately punctured, the basal margin of the second and two following 

 segments with a fascia of short yellowish-white pubescence, the apical 

 segment covered with similar pubescence. 



This species bears a very striking resemblance to the Halictus leucozonius 

 of Europe. 



Hub. Borneo (Sarawak). 



