NORTH AMERICAN PSYLLID^. 77 



radial part of the subcosta terminates nearly at the middle of outer costa, the 

 radius terminating about half way between the end of the radial part of subcosta 

 and the tip of the wing; the outer basal cell is about one-third longer than the 

 radial cell and little shorter, but much narrower than the inner basal cell. 



Described from fourteen specimens. 



The secondary sexual parts in the specimens before me are not 

 well preserved, oyving to the immature condition of the specimens, 

 and I prefer to leave them undescribed at present. 



The form of the head and thorax, and, in fact, the general ap- 

 pearance of this genus, show no important or essential differences 

 from the typical Triozas, but the wing-venation is without parallel 

 in the family, and so remarkable that, with but a single specimen 

 for examination, it might be considered a rather interesting mon- 

 strosity, such as can occasionally be observed in large series of speci- 

 mens of other species. The specimens examined, however show 

 precisely the same venation, and this character, together with the 

 singular form exhibited in the full-grown larva, necessitates the es- 

 tablishment of a new genus. The specimens before me were bred 

 from tlie larva, and as they died shortly after acquiring wings, 

 they are more or less immature. 



Full-grown larvae were found by Mr. Wittfeld at Georgiana, in 

 Southern Florida, on the under side of the leaves of Sideroxylon 

 masticodeiidron, imbedded in small scattered cup shaped excava- 

 tions, which, on the upper side of the leaves, appear as rough, ele- 

 vated pustules. A white, wax-like (not flocculent) excretion covers 

 the dorsal surface of the larva, and has suggested the generic name. 



RHINOPSYLLA, new genus. 



Body moderately slender, very slightly convex dorsally, opaque, glabrous, im- 

 punctate. Head (including eyes) wider than the widest part of the thorax, ob- 

 liquely prolonged and narrowing behind the large and convex eyes, which are 

 thus widely distant from the pronotum ; hind angles obtuse, hind margin nearly 

 straight, and not quite half as wide as the widest part of the head. Vertex deeply 

 and triangularly excised in themiddleof the anterior margin, which is very oblique 

 each side of the excision. The vertex thus appears to be separated anteriorly in 

 two cones pointing obliquely forward, and this peculiar bi-rostrate appearance of 

 the head is enhanced by the basal joints of the antennae forming apparently the 



continuation ofHhese cones; no trace of frontal cones; front margin of vertex with- 

 lo 



