51 



short and articulated to the fifth much further from the apex of 

 the latter. 



AntcoH arisonensis sp. nov. 



Black, the mandibles (except the teeth) yellow, the antennae, 

 except the subinfuscate apical joint, and the legs, testaceous; the 

 middle coxae have a basal dark spot, the hind ones are black 

 except at the apex, the middle femora have a dark line beneath 

 and the posterior ones are dark brown or pitchy except at the 

 extreme base and apex; stigma blackish fuscous, the radius also 

 dark, the rest of nervures pale yellow. 



Head shining, closely subrugosely punctured, but sparsely punc- 

 tate about the ocelli, the antennae with the second and fourth 

 joints subequal, the third considerably longer than the latter, the 

 seventh, eighth and ninth wider than this, and short, being not 

 much longer than wide. Pronotum finely rugulose; the mesono- 

 tum polished, with a few punctures in front, the furrows very 

 short; scutellum impunctate; propodeum rugose and bounded 

 posteriorly by a raised line, posteriorly dull and shagreened to- 

 wards the sides, the median area, defined by very fine raised lines, 

 smoother and somewhat shining. Abdomen smooth and pol- 

 ished. Fifth tarsal joint with fine bristles beneath, those near 

 the articulatory cavity longest, the other extremity of the joint 

 having short spinose ones. Length 2.5 mm. 



The male of this species is smaller, under 2 mm. long, black, 

 with whitish mandibles, the front and middle tibiae and tarsi tes- 

 taceous, the rest of the legs to a large extent blackish or sordid, 

 the knee-joints of the hind legs noticeably pale. The antennae 

 have the basal four joints black, after which they shade into testa- 

 ceous, the apical joints being clear or almost so. 



Head somewhat shining, with somewhat coarse and indefinite 

 puncturation, vaguely channeled in front of the anterior ocellus ; 

 scape of antennae about equal to the two following joints to- 

 gether, the second ovate, but longer than wide, about as long as 

 those following, which do not diflfer much in length, the whole 

 being somewhat moniliform-filiform, the hairs somewhat curved 

 and in general about as long as the width of the joints. Mesono- 

 tum shining, with punctures like those of the head, but much 

 more sparse, scutellum and postscutellum polished and impunc- 

 tate, propodeum closely rugose, posteriorly smoother hardly more 

 than shagreened even at the sides, the median area being defined 

 by very fine lines, but quite observable on careful inspection. Ab 

 •domen smooth and polished. 



