antica- pale underside, face can be a little dark; forewing veins whitish. Male (6.1 or 6.3-7.7 mm), Female (6.0, 7.3-8.6 mm); head edged with bold black line; head slightly downcurved; dark brown markings on the mesosterna just behind the front coxae- these are absent in constricta, which is otherwise very similar

bradleyi- females and male have a black face, venter is pale brownish (lighter in males, darker in females). Male (less than 6.6 mm), Female (less than 8.0 mm)

constricta- lacks blue pigment on wing veins and pronotum, yellow face and venter; black line edging on side of head not as bold as antica. Male (less than 6.6mm), Female (less than 8.0 mm)

mollipes- yellow face, yellow venter; black line edging not as bold as antica. Blue pigment on some veins and usually on pronotal lines; resembles a smaller version of robinsoni. Male (less than 6.6 mm), Female (less than 8.0 mm)

portola- resembles robinsoni, but has inflated face profile; larger than most robinsoni, male (~8.1 mm), female (9.9-10.6 mm) but lacks the blue pigmentation on veins and pronotum that robinsoni has; strictly coastal, rare

robinsoni- blue pigmentation on the pronotum and forewing venation; male abdomen usually mostly dark brown ventrally; male with crown shorter than or subequal in length to pronotum, female crown noticeably longer; abdominal sterna color extremely variable, typically entirely brown with various amounts of yellow; ranges from yellowish or yellowish-brown to blackish. Males much darker ventrally than females, sometimes blackish underneath. Males (6.5-8.2 mm) Females (8.0-10.5 mm)