48 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 78 



middle; clypeus hardly prominent; malar space hardly as long as 

 basal width of mandible, constricted, the mouth hardly as broad as 

 narrowest width of face; occipital carina convergent above with 

 posterior margin of eye, very prominent below, its lower end sepa- 

 rated from hypostomal carina by a very deep, broad groove ; temples 

 from above very weakly oblique, flat, about a third as long as short 

 diameter of eye. Thorax polished, entirely without sculpture; an- 

 terior lateral carina of pronotum low, epomia wanting; prescutum 

 rather high, lateral lobes impressed, with a low tubercle above apex 

 of tegula; scutellum high, compressed; subalar tubercle low, not 

 carinate; propodeum (fig. 5) polished, medially longitudinally deep- 

 ly impressed, carina straight, spiracles broadly oval, apophyses in 

 the form of high transverse carinae, midway between carina and 

 apex ; hind femur less than twice as thick in middle as at base, inner 

 calcarium hardly two-fifths as long as basitarsus ; areolet small, elon- 

 gate, recurrent antefurcal, nervulus interstitial, postnervulus broken 

 above middle, nervellus at about lower third. Abdomen slender; 

 second tergite nearly four times as long as broad at base, shorter 

 than first ; sheath as long as hind tibia. 



Head black and white, the following white, face, clypeus, mouth 

 parts except labial palpi, broad complete orbits and annulus on 

 flagellar joints 4-12; thorax black and white anteriorly and dorsally, 

 pleura, sternum, and propodeum stramineous; the following white, 

 propleura, anterior lateral and humeral margins of pronotum, two 

 discal lines and lateral tubercles on mesoscutum, tegulae, scutellum 

 and its carinae, postscutellum, subalar tubercle; propodeum stained 

 with piceous from base to apophyses, the color darkest at base ; legs 

 pale testaceous to stramineous, front coxae largely white, hind tibia 

 yellow, tarsus white; abdomen white with tergites beyond second 

 black at base, first pale piceous above, second with a black band 

 beyond middle, basad of which it is medially pale grayish brown. 



Type-locality. — La Ceiba, Honduras. 



Type.— Csii. No. 42201, U.S.N.M. 



One specimen taken by F. J. Dyer on October 24, 1916. 



49. POLYCYRTUS (POLYCYRTUS) BICARINATUS, new species 



This and the four following species form a group characterized by 

 having the apical carina apparently complete though with a sharp 

 angular break toward the front medially, this break sometimes not 

 entirely closed. 



Female. — Length 9 mm. 



Vertex in front view nearly flat; frons with shallow but rather 

 well-defined scrobes, horn stout conical with two small pits above 

 at its base and a median elongate tubercle on frons above ; eyes con- 



