SMITH ON HYMENOPTERA OF ARU ISLANDS. 159 



metathorax opake, and clothed w ith black pubescence ; wings fusco- 

 hyaline, the anterior pair darkest towards their base, the nervures 

 dark fusco-ferruginous, nearly black. Abdomen smooth, shining dark 

 blue ; beneath, the margins of the segments have a bright, gUttering, 

 pale-golden pile. 



Gen. Pelopceus, Latr. 



1. Pelopceus laboriosus. P. niger; scapo antice, pedibus petio- 

 loque rufescenti-flavis, alis hyalinis fulvo tinctis. 



Female. Length 12 lines. Black, with black pubescence on the head 

 and thorax ; the face with a fine cinereous pile ; the scape yellow in 

 front; the mandibles smooth and shining. Thorax: the legs pale 

 ferruginous, the posterior femora darkest ; the coxae, the anterior and 

 intermediate trochanters, and base of the femora black ; wings fulvo- 

 hyaline, the nervures ferruginous; the metathorax obliquely striated. 

 Abdomen slightly shining at the base, with the petiole reddish- 

 yellow. 



Hah. Aru. 



Gren. Laeeada, 



1. Larrada modesta.* I/, nigra ; abdomine pilis argentatis fasciato ; 

 alis hyalinis. 



Female. Length 6| lines. Black ; the face covered with silvery down ; 

 the mandibles smooth, shining, black, and fringed beneath with ful- 

 vous hairs, the cheeks silvery. Thorax slightly shining, closely and 

 delicately punctured ; the metathorax opake and transversely striated ; 

 wings subhyaline, with a fuscous border at their apex, the nervures 

 black. Abdomen slightly shining ; the apical margins of the first, 

 second, and third segments with fascia of silvery pile, which is very 

 brilliant in certain lights. 



Male closely resembles the female, but has an additional fascia on the 

 abdomen. 



Hah. Aru. 



Gen. Larea, Fahr. 



1. Larra simillima. L. nigra, pulchre prismatica, maculis fasci- 

 isque variis flavis ornata. 



Female. Length 6^ lines. Black; the abdomen with tints of blue 

 violet ; the thorax slightly prismatic ; the labrum, clypeus, an angular 

 s<^ape above, an abbreviated line on the inner orbits of the eyes, the 

 scape in front, and the antennae beneath, yellow ; the cheeks with a 

 silvery reflexion. The thorax beneath, and the metathorax, with a 

 shining white silvery pile ; the anterior and intermediate femora and 

 tibiae beneath yellow ; the tarsi pale ferruginous, and more or less 

 fuscous above ; wings subhyaline, the nervures fuscous ; a spot on 

 the lateral posterior angles of the metathorax, two ovate spots on the 

 scutellum, and a line on the postscutellum yellow. Abdomen : the 

 basal segment with a broadly interrupted fascia a little before its 



LINN. PROG. — zoology. 11 



