Size: 2.0-2.8mm
Basic colour: Shiny black.
Pattern colour: None
Number of spots: None
Pronotoum: Black
Leg colour: Yellowish, but with femora, tibiae and tarsi at least partly dark brown or black.
Confusion species: Cryptocephalus exiguus
, Confusion species: Cryptocephalus querceti

Size: 2.0-3.2mm
Basic colour: Black
Pattern colour: None
Number of spots: None
Pronotoum: Black
Leg colour: Orange-yellow
Confusion species: Cryptocephalus labiatus
, Confusion species: Cryptocephalus querceti

Size: 3.5-5.0mm
Basic colour: Black and yellow
Pattern colour: Black spots on a yellow background
Number of spots: 5 on each elytron
Spot fusions: Sometimes
Other colour forms: Sometimes
Pronotoum: Black with a variable and irregular central yellow band and narrow yellow side margins.
Leg colour: Yellow or orange-yellow

Size: 5.8-7.5mm
Basic colour: See notes below (sexually dimorphic).
Pattern colour: See notes below.
Number of spots: See notes below.
Other colour forms: Sometimes
Pronotoum: Black (males) or orange/orange-red (females)
Leg colour: Blackish - may be tinged with other colours.

A sexually dimorphic species which has declined since the 1950s. Its UK BAP page is here.

Size: 2-3mm
Basic colour: Black and yellow
Pattern colour: See notes below.
Number of spots: See notes below.
Other colour forms: Sometimes
Pronotoum: Black with fine yellow front and side margins; often two yellow spots near the middle of the rear edge.
Leg colour: Yellow