NORTH AMKEICAN HYMENOPTERA. 245 



12. Tacliyfos aiii-iiU>iitii!ii Fah. PI. XI, fit:. 18. 



9. — Anterior margin of clypeus in the middle forming an obtuse angle, the 

 extreme sides armed with two large teeth, in some specimens not distinctly 

 separated; front with a strong impressed line, which extends from front ocellus 

 to base of antennse; vertex opaque, appearing inipunctate; region enclosed by 

 the ocelli parted by an impressed line; mandibles longer, more strongly curved, 

 and not so broad as any of the preceding species; first joint of flagellum fully 

 one-third longer than the second; the scape is longer than usual; dorsulum 

 having the appearance of being microscopically granulose, scarcely depressed 

 anteriorly; scutellum not impressed; metanotum with distinct, though fine, 

 separated punctures, with a distinct sulcus, which is broadened into a deep, 

 dimple-like fovea at apex, posterior face of metathorax finely granulated, with a 

 very deep medial sulcus; tibife and tarsi armed with stout thorns; outer edge 

 of fore tarsi, when viewed from within, not contracted near the base. Abdomen 

 above and ventral segments 1 — 3 with exceedingly fine and close punctures; 

 ventral segments 4 — 6 with large, sparse punctures; pygidium bronzy, more 

 acute at apex than is usual, black ; basal half of mandibles, tegulse, anterior 

 tarsi, except claws, and the four hind tarsi, except base and apex, ferruginous; 

 front, clypeus, cheeks, thorax on sides and beneath, and first dorsal segment of 

 abdomen with long grayish golden pubescence; collar, metapleurse at apex and 

 most of the legs with a silvery pile; posterior tarsi clothed witii brown pile on 

 outer side; basal two-thirds of wings flavo-hyaline, the apical portion darkened, 

 especially along the costa ; apical margins of dorsal segments 1 and 2 silvery, in 

 certain lights these segments appear entirely griseous. Length 18-- 22 mm. 



% . — Clypeus more broadly produced than in elongaUis, rounded anteriorly and 

 with, an exceedingly slight emargination in the middle; space between the eyes 

 at top about equal to length of second and third joints of antennae united, noue 

 of the fiagellum joints rounded out beiieath ; vertex finely and closely punc- 

 tured, the impressed line distinct; metanotum marked by the fovea at apex 

 only ; tibise armed with strong thorns. Legs, with exception of tibial spurs and 

 tarsi medially, black ; eighth ventral segment with a deep, rounded emargina- 

 tion at apex. Length 12 — 16 mm. 



New Jersey (July and August; common), Florida, Georgia, 

 Louisiana, Tennessee, Texas, Missouri. 



13. Tachytes contractus n. sp. PI. XI, fig. 21. 



9. — Anterior margin of clypeus rounded, armed with an indistinct tooth at 

 each extreme side; second and third joints of liagellum about equal in length ; 

 vertex with exceedingly fine and close punctures, with a strong medial imjjressed 

 line. Thorax punctured like the vertex, a little more distinctly so on the dor- 

 sulum. the latter in the middle, anteriorly, slightly depressed ; scutellum not at 

 all impressed; metanotum not furrowed, but with a strong, pyriform fovea at 

 apex ; the posterior face deeply sulcate ; tibiae and tarsi armed with stout thorns ; 

 when viewed from within, the outer edge of the first joint of the fore tarsi is 

 seen to be strongly contracted near the base; ventral abdominal segments 3--6 

 with large, sparse punctures, the apical margins testaceous, black; basal half of 

 mandibles, teguhe, apex of femora, tibia» and tarsi, ferruginous; front, clypeus. 

 scape, cheeks, collar, four anterior femora, sides of thorax, metapleunc at apex 

 with long, silvery pubescence; dorsal abdominal segments 1 — 3 and ventrals 



TRANS. AM. KNT. SOC. XIX. AUGUST, 1892. 



