HYMENOPTERA. 



39 



but distantly punctured on the disk ; metathorax rounded and 

 having a deep longitudinal channel ; beneath the post-scutellum 

 is a row of radiating sulcations, beyond which is a space trans- 

 versely strigose, the remaining portion covered with deep punc- 

 tures ; wings hyaline, splendidly iridescent, slightly clouded at their 

 apical margins ; the tarsi rufo-piceous. Abdomen, the margins 

 of the two basal segments much depressed, that of the third 

 moderately so ; all the margins above and beneath smooth and 

 shining, the abdomen otherwise covered with large deep punc- 

 tures ; margins of the segments beneath nigro-piceous. 



Male. — Corresponds with the female, the abdomen being less 

 deeply punctured. 

 Hab. $ Para. ^Jamaica? (H. W. Bates, Esq.) 



Genus 14. PARASPHECODES. 



F. Smith's MSS. (Details, Plate III.) 



The species of this subdivision closely resemble in general ap- 

 pearance those of the genus Sphecodes, but the females possess 

 the characteristic anal nraa and also the appendage to the la- 

 brum of the females of the genus Halictus ; the males also have 

 an elongate cylindrical abdomen, and have the clypeus produced 

 and yellow at the apex, as is usual in the same genus ; the tongue 

 offers no positive distinction from some of the species of Ha- 

 lictus, which differ in having that organ more or less elongate and 

 acute, but the superior wings have always the first recurrent 

 nervure united to the second transverso-cubital nervure. All the 

 species are from Australia and Van Diemen's Land. 



1. Parasphecodes Hilactus, n. s. B.M. 



Male. Length 4 to 4| lines. — Head and thorax black, the 

 clypeus moderately produced, yellow at the apex, antennae as 

 long as the head and thorax, thorax strongly and closely punc- 

 tured, the base of the metathorax enclosed by a sharp arched 

 elevation which is more or less waved on each side and forming 

 a point in the centre, the enclosure deeply rugose- striate, slightly 

 radiating ; tegula; rufo-testaceous, wings slightly rufo-hyaline, 

 iridescent and faintly clouded at their apex, nervures ferruginous ; 

 legs red, or sometimes rufo-testaceous. Abdomen elongate, 

 closely and finely punctured, the fourth and following segments 

 black, margins of the three basal ones fuscous. 

 Hab. Swan River ; Adelaide. 



2. Parasphecodes Hiltacus, n. s. B.M. 



Female. Length 3i lines. — Head and thorax black, opake, 

 thinlv covered with hoary pubescence, most dense on the sides 



