51 l>. CAMKRON, HYMENOPTERA f)K 'LUK DUTCH EXPEDITION 



Head smooth, the face sparsely and weakly, the clypeus 

 more thickly and strongly punctured. Mandibles with a red 

 spot on the base above. Mesonotum closely and finely punctu- 

 red, more closely at the apex than at the base ; the furrows 

 do not extend much beyond the middle. There is only one 

 transverse keel on the metauotum ; it is placed shortly behind 

 the top of the apical slope ; the extreme base of the segment 

 is smooth ; it is irregularly longitudinally closely striated on 

 either side of the keel ; the apical slope is more strongly 

 transversely striated ; the only keel is not dilated laterally 

 and there are no spines. Pro- and mesopleurte finely punctured; 

 the former with a striated band down the hollow ; the meta- 

 pleurse more strongly and closely punctured and more or less 

 striated towards the apex. Areolet minute, square, receiving 

 the recurrent nervure at the apex. Hind tibiae sparsely, their 

 tarsi more thickly spinose. 



The black marks on the hind coxae are absent from the 

 smaller specimen. There is no area on the base of the meta- 

 notura. The keel between the 2 hinder coxae is narrow, not 

 dilated and is complete. This is a Mesohtemis as defined by 

 Ashmead (Proc. U. S. Nat Mus. XXHI, 44) it having the 

 metathorax unarmed. It differs from the typical species in 

 having only one transverse keel on the metanotum. 



Neomesostenus ? interstitialis sp. nov. 



Black, the upper half of the inner eye-orbits, the marks 

 narrow below, gradually widened above into a wide triangle, 

 the two uniting on the hinder edge of the vertex, the yellow 

 extending on to the occiput, the labrum, scutellum, a broad 

 band on the middle of metanotum covering the spines, roundly 

 dilated behind and extending en the sides near to the bottom, 

 becoming gradually narrowed below; the narrowed base of the 

 1^' abdominal segment to near the middle, almost the whole 



