Spurgebug

Dicranocephalus medius

Dicranocephalus medius is a speies of the Stenocephalidae family. The bugs grow to a length of 8.6 to 11.4 millimetres. The brown-coloured animals with a beige pattern are difficult to distinguish from Dicranocephalus agilis and Dicranocephalus albipes.
Spurgebug (Dicranocephalus medius) I have no idea how many insects I've observed in my garden over the past 23 years, but it must be many thousands? Yet sometimes, you know the second you spot something that you've never seen it before.

Thus was the case with this Nationally Notable B (scarce) species, today.

Spurgebugs (Family:Stenocephalidae, Genus: Dicranocephalus) get their name, unsurprisingly, from their association with 'Spurge' plants, also known as Euphorbia. 

This is a small genus with only two (very similar) species present in the UK, distinctive with their banded antennae. D. agilis is limited to coastal dunes in Wales and SW England, whereas D. medius is associated with woodland clearings (and now my garden) predominently in central and southern England, which is the reason I can be confident of the ID.

Adults measure approx. 8-11mm and although scarce, can be found all year. Mating takes place in May (if they can find each other!) with new generation adults emerging in August. Dicranocephalus medius,Geotagged,Spring,Spurgebug,United Kingdom

Appearance

They are slightly smaller than Dicranocephalus agilis and have a less elongated body. The other two species can be distinguished from Dicranocephalus albipes by fine nodules between the wing veins on the membranes of the hemielytra. In Dicranocephalus albipes these interspaces are completely smooth. Dicranocephalus medius and Dicranocephalus agilis can be distinguished by the colouration of the first limb of their antennae. In the former species there is a narrow black ring on the inside, followed by a medium sized white ring, a brownish ring and again a medium sized white ring. Finally, at the end of the first antennal limb there is a broad black ring, so that the colouration appears uneven overall. In the similar species, a narrow black ring is followed by two equally large white and black rings on the first antennal limb, so that the antennae appear to be evenly coloured.[3] The first antennal limb has a black ring.

Distribution

Europe, Asia

References:

Some text fragments are auto parsed from Wikipedia.

Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderHemiptera
FamilyStenocephalidae
GenusDicranocephalus
SpeciesDicranocephalus medius
Photographed in
United Kingdom