Microcentrum

Microcentrum louisianum male specimen. The stridulatory area at the base of the left forewing of this specimen was cut out and glued to the side of forewing by its dorsal surface. This exposes the file teeth for examination.

Microcentrum louisianum, male specimen dorsal pronotum. The many pigmented setal pits (small brown dots) distributed over the entire pronotal disk distinguish this species from the closely related and sympatric M. retinerve. M. retinerve has few such pits and they mostly occur along the pronotal carinae.

Microcentrum retinerve, female (one of four individuals reared from eggs by Susan Wineriter).

Microcentrum retinerve, female pronotum. The squarely truncate front pronotal margin serves to distinguish this species from M. rhombifolium.

Microcentrum retinerve, male. The brown on the stridulatory area distinguishes the males of this species from those of M. rhombifolium.

Microcentrum rhombifolium, female specimen pronotum. The tooth on the front pronotal margin serves to distinguish this species from Microcentrum retinerve. The degree of development of the tooth is variable but it is always evident (in both sexes).