222 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



at tlu' middle, the first three Kefjments lonjfitudiuiilly striated, tlie fol- 

 lowing segments smooth, polished. 



Habitat. — Washington, D. C. 



Types in Coll. Ashmead. 



Besides the above speeies, I have seen others tVoni S<mth America 

 and the West Indies. 



LAPITHA Asbm., gen. nov. 

 (Tyjie L. spinosa AnIuu.) 



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

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



Antennje inserted close to the clypeus, 12-jointed in both sexes; in 5 

 clavate, the club 6-jointed; in 5 filiform, the flagellar joints all long, 

 cylindrical. 



Maxillary palpi 4-joiuted; labial palpi 3 j(tinted. 



Mandibles 3-dentate. 



Thorax ovoid, the prothorax not visible from above; mesonotum 

 without distinct furrows, indicated only slightly anteriorly; scutellum 

 large, semicircular, margined behind; metascutellum i)roduced into an 

 acute spine; metathorax 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- 

 mal; the latter clavate, slightly obliquely curved, the postmargiual 

 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 tibijc subclavate, the tibial spurs 1, 1, 1, 

 distinct, the tarsi longer than their tibiic, the basal joint very long, 

 about five times as long as the second joint. 



AUied to Opisthacantha, but of a larger, more elongate form, the 

 head difterently 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. 



' ♦ : ^ ; V ;; V ; ^ Lapitha spiuosa, sp. nov. . 



'• - (PI. IX, Fig. 8,^.) 



S . Length, 3.5'""'. Head and thorax finely, closely punctulate, 

 brownish-yellow ; metathorax with oblicpie carina? extending from base 

 of postscntellum; postscutellum produced into an acute spine. Legs 

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

 wings when folded), black, closely punctate, sometimes the basal half 

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

 latter with punctures in the stria'; first segment a little longer than 

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



