222 BULLETIN 45, UNLrED STATES NATIONAL JiHISEUM. 



at the iiiiddlo, tlie first three .segments longitudiually striated, the fol- 

 lowing segments smooth, polished. 



Habitat. — Washington, D. C. 



Types in Coll. Ashmead. 



Besides the above species, I have seen others from South America 

 and the AVest Indies. 



LAPITHA Asbiii., jjeu. uov. 

 (Type L. spinosa Ashm.) 



Head large, transverse, the occiput and cheeks delicately margined ; 

 ocelli large, in a triangle; eyes long-oval, bare. 



Antennae inserted close to the clypeus, 12-jointed in both sexes; in $ 

 clavate, tlie club G-jointed; in (J filiform, the flagellar joints all long, 

 cylindrical. 



Maxillary palpi 4-jointed; labial palpi 3-jointed. 



Mandibles 3-dentate. 



Thorax ovoid, the prothorax not visible from above; mesoiiotum 

 without distinct furrows, indicated only slightly anteriorly; scutellum 

 large, semicircular, margined behind; metascutellum produced into an 

 acute spine; meta thorax short, emarginated, the sides carinated. 



Front wings with the submarginal vein reaching the costa beyond 

 the middle of the wing, the marginal vein long or as long as the stig- 

 ma! ; the latter clavate, slightly obliquely curved, the postmarginal 

 longer than the marginal. 



Abdomen fusiform, the first three segments nearly equal, the fourth 

 a little more than half the length of the third, the fifth still shorter, 

 the sixth and seventh short, equal. 



Legs long, the femora and tibia^, subclavate, the tibial spurs 1, 1, 1, 

 distinct, the tarsi longer than their tibia?, the basal joint verj^ long, 

 about five times as long as the second joint. 



Allied to 02)ist]iacantha, but of a larger, more elongate form, the 

 head differently shaped, the venation totally different, the basal 

 nervure being more oblique, the stigmal nervure shorter, the post- 

 scutellar spine longer, more acute, while the abdomen is longer, fusi- 

 form, and more narrowed at base. 



Lapitha spinosa, Hp. no v. 



(PI. IX, Fig. 8,,?.) 



S . Length, 3,5""". Head and thorax finely, closely punctulate, 

 brownish-yellow ; metathorax with obliipie cariuie extending from base 

 of postscutellum ; postscutellum i^roduced into an acute spine. Legs 

 yellow. Abdomen fusiform (extending slightly beyond the tip of the 

 wings when folded), black, closely punctate, sometin)es the basal half 

 of third segment yellow ; the first and second segments are striate, the 

 latter with i)unctures in the stria'; first segment a little longer than 

 wide, very slightly wider at apex than at base; second and third seg- 



