THE ACULEATE UYMENOPTERA PROCURED AT ADEN. 107 



truncate ; legs without pubescence, the intermediate and posterior tibise 

 and tarsi thickly spinose, claws of the tarsi simple ; abdomen longer 

 than the head and thorax united, smooth, pygidial area flat, elongate 

 triangular, the sides and apex margined, the surface very finely and 

 closely rugose punctate. Head and thorax black, the basal two-thirds 

 of the mandibles, the clypeus, a triangular mark along the inner orbits, 

 the posterior margin of the pronotum, an oval spot on the scutelium 

 and a transverse line on the post-scutellum yellowish-white, legs dull 

 Indian-red, the anterior femora beneath pale yellowish- white ; wings 

 hyaline, nervures testaceous-brown, tegulse pale yellow, the posterior 

 half brownish ; in the anterior wing the basal nervure is nearly 

 interstitial, the radial cell elongate, narrow acute at apex, the 1st 

 recurrent nervure is received in the 2nd cubital cell about one-third 

 of its length from base, the 2nd recuiTent nervure is received by the 

 3rd cubital cell close to its base. Abdomen dull Indian-red, segments 

 1 to 5 with broad transverse pale yellowish-white stripes on their poste- 

 rior margins, each stripe bi-marginate anteriorly. 



What seems to be a variety of the same insect differs in having the 

 abdomen of a brighter red, and the transverse pale yellow stripes on the 

 segments above reduced to two spots on the 2nd and an iiTegular 

 medial mark on the posterior margin of the 3rd segment, 

 9 . Length 10-12. Exp. 19-25 mm. 

 Aden {Col. Yerhury). 



53. Tkachypus subconcolor, n. sp., pi. A, f. I. 

 9 . Head wider than the thorax, finely and closely punctured, 

 clypeus slightly convex, its anterior margin arched in the middle, waved 

 at the sides, eyes slightly convergent towards the vertex, below reaching 

 almost to the base of the mandibles, their inner orbits emarginate, the 

 vertex and cheeks broad and well developed. Thorax : the pronotum' 

 smooth and shining, the mesonotum and sides of the thorax very 

 coarsely but not very closely punctured, the scutelium, post-scutellum, 

 and median segment shining with a few scattered coarse punctures, the 

 last subtriangular, above smooth, with a medial short longitudinal groove, 

 which, as well as the well-marked sutures between the scutelium an d 

 post-scutellum and between the latter and the median segment, is 

 densely and closely punctured ; legs sub-pilose, the anterior tibipe 

 ciliated with long spines, the intermediate and posterior tibise and tarsi 



