Delphacidae is a family of planthopper

Planthopper

A planthopper is any insect in the infraorder Fulgoromorpha within the Hemiptera. The name comes from their remarkable resemblance to leaves and other plants of their environment and from the fact that they often "hop" for quick transportation in a similar way to that of grasshoppers. However,...

s containing about 2000 species, distributed worldwide. Delphacids are separated from other "hoppers" by the prominent spur on the tibia

Tibia

The tibia , shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates , and connects the knee with the ankle bones....

 of the hindleg. All species are phytophagous, many occurring on various grass

Grass

Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. They include the "true grasses", of the Poaceae family, as well as the sedges and the rushes . The true grasses include cereals, bamboo and the grasses of lawns ...

es, and some are important vectors for cereal

Cereal

Cereals are grasses cultivated for the edible components of their grain , composed of the endosperm, germ, and bran...

 pathogen

Pathogen

A pathogen gignomai "I give birth to") or infectious agent — colloquially, a germ — is a microbe or microorganism such as a virus, bacterium, prion, or fungus that causes disease in its animal or plant host...

s. The brown planthopper, Nilaparvata lugens Stål, is an example.

Genera

• Asiraca
• Calligypona
• Chloriona
• Conomelus
• Criomorphus
• Delphacinus
• Delphacodes
• Delphax
• Dicranotropis
• Ditropis
• Euconomelus
• Euides
• Eurybregma
• Eurysa
• Gravesteiniella
• Javesella
• Kelisia
• Laodelphax
• Megamelodes
• Megamelus
• Muellerianella
• Muirodelphax
• Nothodelphax
• Oncodelphax
• Paradelphacodes
• Paraliburnia
• Ribautodelphax
• Stenocranus
• Stiroma
• Xanthodelphax