176 THE ENTOMOLOGIST. 



Vertex seven-sided, formed much as in Eneides, central keel of 

 front forked nearer to the base than to the apex, somewhat again as in 

 Eueides, but a little more roundedly ; lateral margins anterior to the 

 eyes subparallel. Antennae also very similar to Eiieides, but the 

 second segment a little more dilated apically. Pronotum subrotun- 

 dately emarginate basally, lateral keels reaching to the base, a little 

 arched outwardly ; there is also an impressed dot on each side of the 

 middle keel. Scutellum very large, nearly three times as long 

 medianly as the not insignificant pronotum, the part withm the keels 

 produced posteriorly subacutely, this produced part being about one- 

 third of the entire scutellar length ; lateral keels straight, slightly 

 diverging posteriorly, widely separated anteriorly from the middle keel. 

 Posterior tibife longer than the femora, extending well beyond the apex 

 of the abdomen ; first segment of the tarsus much longer than the 

 other two together. 



Type, P. maidis (Ashmead). 



Delphax maidis, Ashmead, 1890, 'Psyche,' v. 323, text figs. 



Dicranotropis maidis, Van Duzee, 1897, Bull. Buffalo Soe. 

 Nat. Sci. V. 240. 



In his description, Ashmead has omitted to mention a cha- 

 racteristic dark brown elongate spot in the angle formed by the 

 junction of the great claval vein and the interior margin of the 

 tegmen. 



Hab. North America : Florida and Texas ; on corn and 

 coarse grass. Hawaiian Islands : Hawaii, Oahu, and Kauai ; on 

 corn (introduced). 



I am indebted to my friend Mr. Van Duzee for a specimen of 

 this insect, which he had before him when writing his paper on 

 the North American forms (cited above). 



Descriptions and figures of the earlier stages of this and 

 other forms will, it is hoped, appear shortly in another place. 



Megamelus leahi, sp. n. 



The short winged form only is known, and is distinguished 

 from the other described species by the shape of the tegmina, 

 which are longer and narrower, and rounded apically ; the veins 

 are strongly studded with setiferous granules. 



Head, thorax, and legs pale greenish, with a slight bluish tinge ; 

 intercarinal areas on head, a broad band on each side of the central 

 keel of pronotum and scutellum, three small spots on each side of the 

 pronotum between the last mentioned and the lateral keels, and one 

 on the scutellum, pale brownish green. Eyes brownish black. Clypeus 

 apically more or less silvery, spotted with brownish red at the base ; 

 front also somewhat obscurely striped longitudinally with pale brownish 

 green, and spotted apically with brownish red. The legs are also 

 marked with pale brownish green, the apices of tibiae, of tarsi, and of 

 the spines brownish black. Tegmina semiopaque, milky, veins pale 

 brownish, granules dark brownish. Abdomen above pale greenish 

 brown (with a purple lustre towards the base), and with a median and 



