In the Spartina association are found Aphelonema sim- 

 plex, Myndus enotatus, slossoni and pusillus, and Oliarus 

 franciscanus. It is suspected that the nymphs of these 

 species of Myndus feed on the roots of the above mentioned 

 grasses and rushes. Megamelanus spartini has been beaten 

 from the heads of Spartina patens and there are many other 

 Delphacids that are found only in this kind of habitat. 

 Among these may be mentioned Prokelisia marginata and 

 setigera, Megamelanus elongatus, dorsalis and lautus, 

 Megamelus notulus, Bakerella maculata, and Liburnia 

 acuministyla. Pentagramma vittatifrons occurs on the spike 

 rush (Eleocharis) and other sedges. 



f 



Fig. 6 View of Spartina association on an island in the Pascagoula 

 River near its mouth. 



EXTERNAL MORPHOLOGY OF THE FULGORIDAE 



The head. The head is composed of two main sclerites, 

 the epicranium and the clypeus. The epicranium is usually 

 considered to be of three so-called areas, the vertex, frons, 

 and genae. These are strictly terms of convenience and 

 are not designations of separate sclerites. 



The vertex is the top of the head between the eyes, when 

 the insect in a horizontal position is looked upon from above. 

 In many of the Fulgorids the vertex is very short, and the 

 vertex and frons are often confused and hard to distinguish ; 



16 



