HYMENOPTERA. 197 



tooth anteriorly and posteriorly ; the anterior tibiae and tarsi, and 

 the apical joints of the intermediate and posterior tarsi ferrugi- 

 nous. Abdomen ovate, margined at the sides and emarginate 

 at the base. 



Var. minor. The scape, apical joint of the flagellum, the head, 

 before the eyes, and the legs, ferruginous. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



7. CATAULACUS INSULARIS. 



Male. Length 3 lines. Black : the lateral angles of the 

 vertex produced into stout acute spines ; the inetathorax bispi- 

 nose. The head and thorax rugose ; the antennae, eyes, mandibles, 

 tibiae and tarsi, ferruginous ; the eyes large and prominent ; the 

 clypeus produced, truncate anteriorly; the sides of the head 

 behind the eyes serrated ; beneath the lateral spines of the vertex 

 are two smaller spines ; the wings pale flavo-hyaline, the ner- 

 vures scarcely discernible ; the metathorax emarginate its entire 

 width, with an acute spine at the lateral angles. The nodes of 

 the abdomen rugose ; the first node oblong-quadrate, the second 

 nearly quadrate ; the abdomen reddish at the base, and, as well 

 as the nodes, thinly sprinkled with erect whitish hairs. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



Genus 4. ECHINOPLA. 



Echinopla, Smith, Proc. Linn. Soc. ii. 79 (1857). 



Head transverse ; eyes small, placed laterally, high 011 the 

 head, on the top of short pedestals ; antennae 12-jointed, inserted 

 forwards on the head, wide apart; labial palpi 4-jointed, the 

 three basal ones of about equal length, clavate, the apical joint 

 as long as the two preceding joints united. Maxillary palpi 5- 

 jointed, elongate, the three apical joints long and slender, the 

 two basal ones much shorter and stouter. Mandibles short, stout, 

 and of equal width throughout, armed with four teeth at the 

 apex. Thorax oblong- quadrate; legs of moderate length; tarsi 

 5-jointed, each tibia armed with a single spine at the apex. Ab- 

 domen globose ; peduncle formed of a single node ; the first 

 segment very large, concealing the other segments beneath it. 



1. ECHINOPLA MELANARCTOS. B.M. 



Echinopla melanarctos, Smith, Proc. Linn. Soc. ii. 79. 1 $ . 



Worker. Length 2^-3 lines. Black : body hispid ; the palpi 

 pale testaceous; on each side of the face anteriorly is a thin 



