of Exotic Hymenoptora. 75 



Worker. Length 3 lines. Black and shining ; finely punctiu'ecl, 

 each puncture having a shining silvery seta ; the margins of the head 

 before the eyes, the apex of the scape and also of the flagellum pale 

 fen'uginous. Thorax much narrower than the head, armed on each 

 side anteriorly with two acute stout spines, from which it is much 

 narrowed to the base of the metathorax, which has a long, stout, blunt 

 spine at each of its posterior angles, these spines each having a smaller 

 one at their base outside ; the tips of the femora, the tibiie, and ante- 

 rior tarsi ferruginous, the claw-joint of the intermediate and posterior 

 tarsi ferruginous. Abdomen ovate, emarginate at the base, which has 

 on each side a thin, transparent, pale lamina ; the nodes of the peduncle 

 transverse, and spinose on each side. 

 Hub. Brazil. 



This insect is described as the worker of C. q^uaclrhnaculatus on 

 the authority of Mr. H. W. Bates, who took them in their nest ; of 

 this species he remarks, " The difference between the female and 

 worker in form is very remarkable : I find a constancy in the spines, 

 &c., in all the workers, showing that the species are constant in their 

 characters: the female has a spotted abdomen." The female is 

 described by King in his Monograph on the genus; I have also 

 described and figiu-ed it in the second volume of the ' Transactions 

 of the Entomological Society,' new series. 



2. Cryptocerus elongatus, King. 



Foet7ima. C. elongatus, aterrimus; thorace antice posticeque spinoso. 

 Long. lin. 5. 



Operaria. C. niger, depressus; capite thoraceque setis aurato-nitidis 

 omatis; thorace latere utroque spinis quinque acutis arniato; capitis 

 margiaibus lateralibus ante oculos pallide testaceis. 



Worker. Length 2-2 ^ Hues. Black, depressed, and with glittering 

 pale golden setaj on the head and thorax, sometimes a little on the legs 

 and base of the abdomen ; the sides of the head, before the eyes, pale 

 rufo-testaceous, the margins narrowly membranaceous ; the tip of the 

 antennae testaceous. Thorax : the anterior angles bispinose, fi*om 

 whence it is abruptly naiTowed to the base of the metathorax, with a 

 minute spine near the sutm-al division ; the metathorax with a minute 

 spuie at its basal angles, and a long, stout, diverging one at the apical 

 ones ; the tarsi rufo-piceous at then- apex. Abdomen ovate, with the 

 basal margins narrowly testaceous ; the nodes of the pedimcle trans- 

 verse, and having on each side an obtuse spine. 



Uah. Brazil. 



The worker is described on the authority of Mr. H. W. Bates ; 

 the female is described by Ivlug in his Monograph on the genus. 



