100 MB. smith's besceiptioks of htmenopterotjs insects 



pale ferruginous ; thorax flattened above, the margins acute and slightly 

 elevated; the metathorax oblique and armed with two long acute 

 spines, directed backwards ; the femora ferruginous, the tibiae and 

 tarsi very obscurely so, not pubescent. Abdomen : ovate, the node 

 of the peduncle with two acute spines, shorter than those on the 

 metathorax ; antennae as long as the body. (Plate I. fig. 20-21.) 

 Hab. Dory. 



Most of the species belonging to this genus are, when in fine condition, 

 covered with glossy pile, but it is easily abraded. This is the case, I sus- 

 pect, in the majority of specimens. 



13. PoLYRHACHis Atropos. P. nigcr, capite thoraceque striatis ; 

 thorace spinis duabus acutis antice et duabus postice armato ; abdo- 

 minis squama bispinosa. 



Worker. Length 2 lines. Black : the head longitudinally striated, very 

 prominent in the middle before the eyes ; the sides of the face de- 

 pressed and flattened The thorax flattened above, longitudinally 

 striated, the lateral margins raised, the anterior angles short, stout, 

 and acute _, the division between the pro- and mesothorax deeply im- 

 pressed ; the metathorax obliquely truncate, armed with two acute 

 spines which are directed backwards. Abdomen : globose and thinly 

 clothed with short pale glittering pile ; the peduncle has the node 

 armed with two curved spines directed horizontally backwards round 

 the base of the abdomen. (Plate I. fig. 22.) 



Hab. Dory. 



14. PoLYRHACHis AcASTA. P. uigcr, pubc cinereo-sericea vestitus ; 

 thorace antice posticeque abdominisque squama spinis duabus longis 

 acutis armatis ; pedibus ferrugineis, femoribus apicis tarsisque nigris. 



Worker. Length 3} lines. Black, and thinly clothed with silky cine- 

 reous pile. Thorax rounded above : the anterior spines are short, 

 stout, and acute ; those on the metathorax are twice as long, stout 

 and slightly divergent ; those on the peduncle are long, acute, and 

 curved backward, corresponding to the form of the base of the abdo- 

 men ; the tibiae and femora ferruginous, the tips of the latter black. 

 (Plate I. fig. 23.) 

 Hab. Bachian. 



This insect, Mr. Wallace says, " constructs a coarse papery nest in a rolled 

 leaf;" all the species of this genus, as far as I have ascertained, form small 

 nests of some papyraceous material, aifixing them to leaves : I have re- 

 ceived such from Calcutta. 



15. PoLYRHACHis Alphenus. P. nigcr pube cinereo-sericea ves- 

 titus ; thorace spinis duabus minutis antice et postice armato ; squama 

 quadrata spinis duabus crassis acutis armata, flagello apice ferrugineo. 



Fetnale. Length 4 lines. Black, and thinly covered with cinereous pile. 

 The mandibles, palpi, and six apical joints of the antennae, ferruginous. 

 Thorax subovate, with two minute spines in front and two rather 



