174 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



margin the tegmina become colorless, like ground-glass, with 

 immediate margin buffy, this preceded by a very narrow suffusion 

 of hydrangea red proximad; the veinless area of the stridulating 

 field is also colorless, like ground-glass. Head, except vertex 

 (which is light elm green and occiput which is washed with that 

 color), and narrow portion of lateral lobes of pronotum, toward 

 ventral margin buffy. Wings transparent but showing some opaque 

 tendency like ground-glass, the cross-veinlets narrowly outlined 

 in barium yellow. Limbs unicolorous, light elm green. 



Length of body 16, length of pronotum 4.2, greatest pronotal 

 width 2.9, height of longest lateral pronotal spine .8, depth of 

 pronotal lateral lobe 2.2, length of pronotall ateral lobe 3.9, length 

 of tegmen 13.4, median width of tegmen 5.1, length of cephalic 

 femur 8.3, length of median femur 7, length of caudal femur 

 13.2 mm. 



The type of this beautiful species is unique. 



Mossula kiriwina new species. Plate XIV, figures 17 and 18. 



This insect is nearest M. salomonis Kirby, apparently differing 

 in the dark occiput, pale proximal portions of the antennae, dark 

 caudal margin of the pronotal disk, narrower tegmina and shorter 

 limbs. 



In general appearance and the majority of generic and higher 

 characters it is seen to agree closely with the species before us, here 

 recorded as Paradiaphlebus notatus Brunner. In such features it 

 differs primarily in having the cephalic femora with auditory fora- 

 mina flattened conchate and in the vertex, which tapers to a minute 

 rounded point with sides swollen, then falling away and sharply 

 concave declivent to another similar projection, immediately above 

 its intersection with the facial fastigium. 



The present group, including these genera and Diaphlebus, 

 requires careful revision and until this is done the proper number 

 of valid genera contained can not be determined. 



Type: cf ; Kiriwina, Trobriand Island, Melanesia. 41 [Hebard 



Collection, Type no. 808.] 



Form moderately robust. Eyes large, larger than in P. notatus. 

 Vertex as described above. Maxillary palpi with fourth joint 

 slender proximad, three-fifths as long as third, third joint nearly 

 as the elongate, thickened, very weakly expanding and very weakly 

 curved fifth joint. Pronotum with surface coarsely and heavily 

 wrinkeled, shaped much as in P. notatus, disk flattened and moder- 

 ately concave caudad; caudal margin truncate, showing a very 

 slight convexity; lateral lobes longer than deep, the humeral sinus 

 distinct but not deep. Tegmina and wings fully developed; the 



41 Situated off the northeastern coast of New Guinea. 



