Identificaciones de pourtwowest

1. Length of basal article of antenna less than twice width.
2. Cornea of retracted eye still at least partly visible from above.
3. Post-orbital spine flattened and expanded laterally; telson of male very wide, fitting into a slot in abdominal segment 6.
4. Hepatic region diøated laterally, forming with post-orbital region a lyriform shelf; carapace margin contracted between it and branchial region.

Hyas coarctatus.

1. Length of basal article of antenna less than twice width.
2. Cornea of retracted eye still at least partly visible from above.
3. Post-orbital spine flattened and expanded laterally; telson of male very wide, fitting into a slot in abdominal segment 6.
4. Hepatic region diøated laterally, forming with post-orbital region a lyriform shelf; carapace margin contracted between it and branchial region.

Hyas coarctatus.