SMITH ON HYMENOPTERA OF ARU ISLANDS. 167 



Q-en. IcARiA, Sauss. 



1. Icai'ia maculiventris, Saiiss. Mon. Guepes Soc. p. 23. 1. — Rhopalidia 

 maculiventris, Gu&. Voy. Coq. Zool. ii. pt. 2. Ins. p. 267, pi. i^- fig- 8. 



Hab. Aru; New Guinea. 



2. IcARiA NIGRA. I. nigra; clypeo antice angulato; metathorace con- 

 cavo et transversim striate; alis hyalinis. 



Female. Length 6 lines. Black, punctured and opake ; the clypeus 

 terminating in a sharp-pointed angle ; the base and apex of the man- 

 dibles rufo-piceous ; the scape ferruginous in front ; the face with a 

 thin, fine, griseous pubescence. Thorax shghtly margined in front ; 

 an obscure testaceous spot on each side of the postscutellum, the 

 metathorax concave and transversely striated ; wings hyaline. Ab- 

 domen with a short petiole to the basal segment, which is very short 

 and cam})anulate ; at its posterior margin are two minute, obscure, pale 

 spots ; beneath, the margins of the apical segments are rufo-piceous. 



Hab. Aru. 



3. IcARiA FASCiATA. /. nigra; clypei margine antico, maculis duabus 

 postscutelli flavis ; segmentis abdominis ad apicem flavo anguste 

 fasciatis. 



Female. Length 5 lines. Black ; the clypeus angular in front, its 

 anterior margin and a spot on the mandibles yellow ; the antennae 

 rufo-testaceous beneath. Thorax: the anterior margin of the pro- 

 thorax slightly rebordered ; the anterior coxse with a spot in front 

 and two spots on the postscutellum yellow ; the anterior and inter- 

 mediate tibise beneath, the tarsi beneath and the claw-joint entirely, 

 ferruginous; wings hyaline with a fuscous stain along the anterior 

 margin of the superior pair; the metathorax oblique and slightly 

 concave, with an acute stout tooth on each side. Abdomen : the 

 basal segment campanulate, the petiole short ; a narrow yellow fascia 

 on the apical margin of all the segments. 



Hab. kxvi. 



4. IcARiA BRUNNEA. /. rufesccuti-fusca ; coxis femoribusquc obscuris ; 

 alis hyalinis. 



Female. Length 3| lines. Reddish-brown; head and thorax punc- 

 tured, the abdomen finely rugose; the clypeus and mandibles pale 

 ferruginous, the former with a darker spot in the middle, the anterior 

 margin angular. The anterior margin of the prothorax slightly re- 

 bordered ; the wings hyaline and iridescent, with a fuscous stain . 

 along the anterior margin of the superior pair; the metathorax 

 abruptly truncate. Abdomen : the basal margin of the third and 

 following segments black. 



Hab. Aru. 



5. IcARiA GRACILIS. I. nigra flavo variegata; abdominis scgmento 

 basali elongato, gracili et petiolato ; alis hyalinis. 



