SMITH OS HYMENOPTEEA OF ARU ISLANDS. 173 



on the basal segment, and a transverse curved impressed line on the 



other segments. 

 Hab. Key Island. 



This species might at first sight be mistaken for a species of the genus 

 Bracon. The male only differs from the female in having the abdomen 

 black, with only the basal segment yellow ; the wings are only very 

 slightly yellow at their base ; it is also rather smaller. 



3. PiMFLA PENETRANS. P. flavo-fcrruginea ; flagello fusco ; alis 

 flavo-hyalinis, apice fuscis. 



Female. Length 4^ lines. Reddish yellow, smooth, and shining ; the 

 face testaceous, with slight fuscous stains ; the scape and two or three 

 of the basal joints of the flagellum yellow in front ; the wings hyahne, 

 with a yellowish tinge ; the nervures black, except the costal nervure, 

 which is ferruginous towards the base, the apex of the wings slightly 

 clouded ; the posterior tibiaj fuscous above. Abdomen : the segments 

 with slightly impressed oblique depressions, the ovipositor shorter 

 than the abdomen, and black. 



The Male only differs in having the abdomen rather more slender. 



Hab. Aru. 



4. PiMPLA FERRUGiNEA. P. flavo-fcrruginea ; autennis supra fuscis ; 

 alis hyalinis. 



Female. Length 5^ lines. Ferruginous, with the head and thorax 

 beneath yellow -testaceous ; the coxae also are of the same colour; the 

 flagellum slightly fuscous above ; the wings flavo-hyaUne, the ner- 

 vures black; the two basal segments of the abdomen shining, the 

 third and the following segments subopake ; the ovipositor as long as 

 the abdomen. 



Hab. Key Island. 



5. PiMPLA PLAGiATA. P. flavo-rufa ; antennis strigisque tribus 

 mesothoracis nigris ; alis hyalinis, apice cellulae marginalis fusco uni- 

 maculato. 



Female. Length 5| lines. Yellow, the legs with ferruginous stains; 

 the antennae black, with the scape yellow in front ; the head with a 

 large ovate black spot behind the ocelli. Thorax finely punctured on 

 the disk of metathorax, which has three longitudinal broad black 

 stripes, a narrow black line on the posterior margin of both the scu- 

 tellum and postscutellum ; wings hyaline, the nervures black, with 

 a dark fuscous spot at the apex of the marginal cell. Abdomen 

 reddish-yellow, with the apical margins of the segments yellow ; the 

 ovipositor black, and shorter than the abdomen. 



Hab. Aru. 



Gen. Ehyssa, Grav. 



1. Rhyssa maculipennis. R. rufescenti-flava ; antennis et vertice 

 nigris ; alis hyalinis, plaga nigro-fusca. 



