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Common NameShothole borer. SeasonalityAdults may be found all summer long (depending on growth conditions) but activities generally peak from April to June. If conditions allow for three generations, first adult emergence is usually in March, followed by another in May, and a last one in June (Bright 1976). IdentificationAdults may be completely black, or black with a bit of a red margin around the edges, or reddish brown. Frons are flatten (more so in males) and the ventral abdominal stenites slope up gently to meet the elytra (LaBonte et. al. 2003). They can be around 1.8 to 2.4 mm long (Bright 1976). This species of Scolytus do not have a spine on its abdominal sternites (LaBonte et. al. 2003).

Common NameHemlock engraver. SeasonalityAdult S. tsugae may usually present from May to early September, with peak activity late June and July (McMullen & Atkins 1959, Bright 1976). IdentificationThe adults of these beetles may be 2.8 to 3.5 m long, with a black body (Bright 1976). In males, the frons is generally flat or slightly convex with course articulation. Females, on the other hand, have frons that is convex with finer articulation (Bright 1976).

Common NameDouglas-fir engraver SeasonalityAdults emerge from late June to August, but some adults have been noted to have emerged in May (possibly due to favourable developmental conditions). IdentificationAdult beetles are 2.6 to 3.5 mm long with black stout bodies (Bright 1976). In both males and females, the abdominal sternite is not concaved, but rather ascends vertically to meet the elytra (which extend over the abdomen) (Bright 1976). A median tubercle may be found on the 2nd sternite and the base of the tubercle is joined with the posterior margin of sternite 2 (Bright 1976, LaBonte et. al. 2003).

Common NameFir engraver SeasonalityAdult may be seen from June to September with peak activities in July and August (Bright 1976). IdentificationAdults are around 3.3 - 4.3mm in length (Bright 1976). The body is generally black or reddish brown. In both males and females, the second sternite is produced anteriorly (weaker in the females) and only the males have an acute tubercle on the posterior margin of the 2nd sternite (Bright 1976, LaBonte et. al. 2003).

Common NameStriped Ambrosia Beetle SeasonalityAdults' flight period is between spring and late summer. IdentificationAdults are recognized by their smooth shiny elytral surface, the interspaces usually very minutely and irregularly punctured and raised subapical margin of elytra that gives them a broadly rounded appearance when viewed from above. Elytra are usually bicoloured with alternating patterns of five dark and four pale stripes. General appearance of adults colour is very dark brown to black. Females and males differ in size and sculpture. Length is 3mm – 3.5mm in females and 2.7mm – 3.2mm in males. Frons of females is convex with surface reticulated with sparse granules while in males they are concave with lateral margins ornamented by abundant hair. Anterior margin of pronotum is usually unarmed (without teeth) in both sexes but rounded in females and straight in males (Bright, 1976; Wood, 1982).

SeasonalityInitial flight in spring (early April) till early May, then June to late summer. IdentificationAdults are distinguished by their large size, smooth and shining surface of elytra with apical margin appearing subacuminate when viewed from above. Colour is uniformly black when mature but young adults have a pale yellowish brown colouration at the base of the pronotum to the apex of elytra. Length is 3.8 – 4.6 mm for females and 3.6 – 4.3 mm for males. Frons are convex with surface reticulated with sparse granules in females. In males they are concave with lateral margins ornamented by abundant hair. In females the anterior margin of pronotum is usually rounded, armed with four teeth, the median pair being larger while in males the margin is feebly recurved and unarmed (without teeth) (Bright, 1976; Wood, 1982).

SeasonalityNot investigated, but probably similar to T. lineatum (Bright, 1976). IdentificationRecognized by their dull finely reticulated surface of the elytra, with apical margin appearing subacuminate, narrowly rounded posterior margin, when viewed from above. (Bright, 1976; Wood, 1982). Frons of male deeply concave with lateral margins ornamented by abundant hair and anterior margin of pronotum straight and unarmed. Females frons are convex, surface reticulate with fine, sparse granules. Anterior margin of pronotum is rounded and unarmed. (Bright, 1976; Wood, 1982)