Comprehensive Description

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General Description

This species has both a red and yellow form, and both are slightly more robust around the pronotum and posterior abdomen thus giving them a very subtle hourglass shape as opposed to P. exaptus' distinct oval shape. The colouring of the red form is primarily in the pronotum and scutellum. In these structures the colouring appears only around the margins, except that in the pronotum a medial red strip separates two large black spots, and on the scutellum the basal margin remains black. The characteristic black spots on the pronotum also aid in distinguishing this species from P. exaptus. The margins of the connexivum and basal portions of the hemelytra are also red coloured. In the yellow form, slight differences occur in the location of the colouring. The pronotum still has a thick red bar along its posterior margin; however the black spots are surrounded by yellow. Additionally, the margins of both the corium and scutellum are completely lined with yellow enclosing blackened regions in the centres of these structures. As in the red form, the margins of the connexivum and basal portions of the hemelytra are yellow as well. The fore-femora of both forms have a ventral, elongated spine contrasting the stubby tubercle present in P. exaptus. This species is much larger in size than P. exaptus; length 8.5 to 11.5 mm (Blatchley 1926; McPherson 1982).


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Source: University of Alberta Museums

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