336 BRUES. 



twice as long as their tibia?; middle legs rather slender; hind femora 

 greatly thickened and flattened, over half as broad as long and only 

 two-thirds as long as their tibia?, which are but little thickened. Tarsal 

 claws apparently simple. Wings with an elongate, narrowly lanceo- 

 late stigma the tip of which reaches nearly to the middle of the radial 

 cell; radial cell ovate, pointed at the tip; basal vein oblique, the 

 cubitus arising near its upper third; submedian cell distinctly longer 

 than the median; second discoidal cell closed, large, nearly twice as 

 long as high; first cubital and first discoidal cells defined by hyaline 

 thickenings, the cubital cell not closed externally. 



Three specimens, type XXB1629; others not numbered. 



This is a most remarkable form which combines certain characters 

 of the Bethylida? and Ampulicida?. In its complete wing venation it 

 resembles Pristocera, but the head is much more flattened and the legs 

 much thicker, so thick indeed that one would suspect the specimens of 

 being females. I am quite positive, however, that they are males, as 

 there is no trace of a sting in any of the several finely p^^rved speci- 

 mens at hand. The greatly elongated prothorax with a median iV'tow 

 recalls members of the Ampulicidse, as does also the form of the head, 

 but the abdomen is not petiolate. The flattened pro- and mesothorax 

 show it to be a highly modified form. 



Calyoza longiceps sp. now 



9 ■ Length 2.7 mm. Head very long, including the mandibles, 

 fully as long as the entire thorax; these much elongated, seen from the 

 side of the head fully two-thirds as long as the head. Eyes oval, 

 placed near the anterior margin of the head, removed by one and one- 

 half times their length from the posterior margin, their surface bare. 

 Head finely shagreened, the ocelli in a small equilateral triangle near 

 the vertex. Antennae 13-jointed; short, reaching but little beyond 

 the posterior margin of the head. Scape stout, twice as long as the 

 pedicel, curved; first flagellar joint narrow, only about one-half the 

 length of the pedicel; following of about equal length, widening and 

 becoming quadrate; apical joint longer and obtusely pointed. Man- 

 dibles broad at tips, 5-dentate, the four posterior teeth short and equal, 

 the anterior one very long and acute, about three times as long as the 

 others. Pronotum one-half longer than the mesonotum, and about 

 twice as broad as long, exclusive of the neck portion. Mesonotum 

 with two furrows, convergent behind, which separate it into three 



