STUDIES IN THE FOSSORIAL WASPS. 743 



of the radius a little longer than the first, the third longer than 

 the first and second combined ; first recurrent nervure received 

 just beyond two-fifths from the base of the second cubital cell, 

 second close to the middle of the third cubital cell. Tarsal ungues 

 bifid ; lobe beneath the basal half of the hind femora not very 

 prominent and very feebly rounded ; basal joint of hind tarsi 

 with a row of short hairs beneath ; basal joint of fore tarsi 

 strongly produced at the outer apical angle. Shining and sparsely 

 punctured ; median segment opaqvie, closely and minutely punc- 

 tured ; apical dorsal segment coarsely punctured and thickly 

 clothed with long fuscous hairs. 



Black ; a spot on each side near the anterior angles of the pro- 

 notum, a spot on the mesonotum, a spot at the base of the median 

 segment and one at each of the posterior angles, and a spot on each 

 side of the second and third dorsal segments yellowish white ; 

 calcaria whitish. Wings pale fusco-hyaline, nervures fuscous. 



d . Second abscissa of radiiis twice as long as first, third about 

 half as long again as second ; first recurrent nervure received a 

 little beyond the middle of the second cubital cell, second at two- 

 fifths from the base of the third cubital cell. Tarsal ungues bifid ; 

 hind tibise serrate on the outer margin. Basal abdominal segment 

 nearly half as long again as the breadth at the apex. Finely and 

 rather closely punctured, abdomen finely sha greened. 



Black ; mandibles, clypeus, scape beneath, a spot on each side 

 of the pronotum, a spot on the mesonotum, a spot on the 

 scutellum, one on the postscutellum, another at the apex of 

 the median segment, the base of the tibiae, and the tarsi pale 

 yellow. Wings hyaline iridescent, nervures nearly black. 



Length, $ 12 mm., c? 9 mm. 



ITab. Amazon, from Para to Ega. 



30. Anthobosca antennata Sm. 



Anthohosca antennata Sm. Descr. new spec. Hymen, p. 174 

 (1879), cT_. _ 



Cosila jheringi Saussure in Grandidier, Hist. Madagascar, xx. 

 p. 234 (1892), 2 . 



Thynnus antennatus D. T. Cat. Hymen, viii. p. 101 (1897), c? . 



$ . Radial cell very narrowly rounded at the apex ; third 

 abscissa of radius half as long again as the second, which is 

 nearly twice as long as the first, the fourth shorter than the first ; 

 first recurrent nervure received a little before the middle of the 

 second cubital cell, second at one-fifth from the base of the third 

 cubital cell. Tarsal ungues bifid ; lobe beneath the hind femora 

 commencing near the base and extending to the apex, broadly 

 rounded ; basal joint of hind tarsi with a row of very short fine 

 spines beneath ; basal joint of fore tarsi strongly produced at the 

 outer apical angle. Shining, very finely and rather sparsely 

 punctured ; median segment subopaque, very closely and minutely 



