224 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



t 



iug the species con<;eiieiic. The type of the geuusj Cr<c».s wcantlii Uik'y, 

 has 3-deDtate maudibles. Those witli 2-deiitate mandibles are from 

 South America and the West Indies, and are not inchided liere. 



The only species whose parasitism is known was bred by Prof. F. M. 

 Webster from the eggs of Oecanthus niveus De Geer. 



Cacus cecaiithi, isp. iiov., Kiley. 

 (ri. XVI, Fig. 6, $.) 



" (J $ . Length, 2 to 2.20""". Black, subopaque, closely i^unctate, and 

 covered with a fine, sericeous down. Head quadrate, the cheeks 

 large, swollen, with striiB converging toward the mouth; mandibles 

 and palpi, pale; antenna3 with the base and apex of scape and two 

 last funicular joints pale; pedicel rather long, thicker than the tirst 

 funicular joint; the latter longer and slenderer than the pedicel; 

 second funicular joint one-third shorter than the first; third and fourth 

 trans\erse. Thorax without mesouotal furrows; metathorax with a 

 central carina and margined at apex; legs pale rufous, the coxa? 

 slightly dusky basally; wings hyaline, the marginal vein about half 

 the length of stignnil, the latter knobbed at tip, the i)0stmarginal vein 

 long. Abdomen long, sublinear, narrowed at base, about one-third 

 longer than the head and thorax together, and extending beyond the 

 tip of the wings when folded; first segment petioliform, striated, the 

 second and third longitudinally shagreened, nearly e(j[ual in length, the 

 following microscopically sculptured. 



''The S agrees with the female very closely in shape, but the three 

 basal abdominal segments are striated and the antenna; are filiform, 

 brownish-yellow, the first and second funicle joints being about equal, 

 thrice as long as the pedicel, the third one-third shorter than the sec- 

 ond, the following to the last very slightly shorter and almost e(jual in 

 length, the last pointed, fnsiform, and as long as the third fiagellar 

 joint. 



" Habitat. — Lafayette, Ind. 



"Types in National Museum. 



" Bred by Prof. F. :M. Webster, May 31, 1881, from the eggs of aJcan- 

 thus niveus.''' — [From Riley^s MIS.] 



Anteris FursttT. 



Hyni. Stud., ii, p. 101 (1856). 



(Type A. rufitavxia Fni-fst. ) 



Head transverse, the face convex or subconvex, not, or but slightly, 

 impressed above the antenna', the occiput and cheeks delicately mar- 

 gined; ocelli 3, triangularly arranged, the lateral about their width 

 from the border of the eye; eyes oval, usually pubescent. 



Auteniue inserted at the clypeus, 12-jointed in both sexes, in 9 cla- 



