438 P. CAMERON. 



rated from the face, its apex transverse with the sides round. 

 Labrum hidden. Malar space half the length of the eyes. 

 Claws long, slender. Tarsi closely spinose. Abdominal 

 petiole long, longer than the second segment ; the post- 

 petiole not much dilated ; the spiracles prominent. As usual 

 the antennae are stout and are ringed with white ; the first 

 joint of the flagellum is a little longer than the second. 

 Thorax more than three times longer than wide. Meta- 

 thorax large, as long as it is wide at the base. 



A genv'S of Mesostenini easily known by the absence of 

 parapsi^al furrows and of transverse keels on the metanotum 

 and by trie violaceous wings. 



22. Ateleonotus ruficeps sp. n. 



Black, the head, antennal scape, the lower part of the pronotum, the 

 propleurae near the base and the fore femora and tibiae red ; wings 

 fuscous violaceous, a clear L^ aline cloud in the fore wings outside and 

 touching the transverse cubital and recurrent nervures and extending 

 to the middle of radius and backwards to the anal nervure. The 

 seventh to twelfth joints of the antennas are white. 9 . Length 17 

 mm., terebra 5 mm. 



Face and clypeus closely punctured, the face roundly dilated in the 

 middle. Front strongly obliquely striated, keeled down the middle ; 

 the vertex smooth, the occiput closely, somewhat strongly punctured. 

 Mesonotum strongly, closely reticulated ; the scutellar depression 

 smooth. Scutellum strongly punctured. Metathorax more closely 

 reticulated than the mesonotum. Propleurae punctured above; the 

 rest stoutly, closely striated. Mesopleurae closely punctured, the apical 

 part more or less striated. Basal segments of abdomen weakly, finely 

 punctured. The fore femora are blackish on the basal half behind, 

 their tibiae have the basal half infuscated behind ; the four front coxae 

 smooth, the hinder closely, rather strongly punctured ; the tarsi below 

 are closely covered with rufous spines. Palpi and apex of mandibles 

 black, the base of the latter rufous. There is a smooth shining line 

 on either side of the apical half of the mesonotum. The pubescence 

 on the mesonotum is short and dense ; on the metanotum it is longer. 

 The abdomen above is bare and shining. 



Mendoza, March. 



LAUSOBA gen. nov. 

 Transverse median nervure received shortly behind the 

 transverse basal. Areolet rather small, 5-angled, the nerv- 

 ures almost meeting in front. The transverse median nerv- 

 ure in hind wings broken far below the middle. Parallel 



