. An annotated list of the important North American forest insects. Forest insects. BULLETIIsr 1182, U. S. DEPAKTMENT OF AGRICULTURE. ADULT. This species is the only North .Vinerican representative of the genus Diprion and may be readily distinguished from the other Nearctic species belonging to the subfamily Diprioninae by the large and densely punctured metascutellum. The specmiens which have been examined show very little variation, and all seem to represent the typical form of the species. Female (Fig. 1, a).—Length 7 to 9 millimeters. Clypeus truncate; head with large, rather close punctu
. An annotated list of the important North American forest insects. Forest insects. BULLETIIsr 1182, U. S. DEPAKTMENT OF AGRICULTURE. ADULT. This species is the only North .Vinerican representative of the genus Diprion and may be readily distinguished from the other Nearctic species belonging to the subfamily Diprioninae by the large and densely punctured metascutellum. The specmiens which have been examined show very little variation, and all seem to represent the typical form of the species. Female (Fig. 1, a).—Length 7 to 9 millimeters. Clypeus truncate; head with large, rather close punctures; postocellar area convex and more than twice as wide as long; postocellar furrow well defined; antenna distinctly tapering, the joints much broader than long and with very short rami (apical joints practically without rami), third joint distinctly longer than the fourth,; scutum shining, with large, distinct punc- tures; scutellum and met- ascutellum opaque and with the punctures closer; tibial spurs simple; pad- like part of sheath ellip- tical in outline and close to the median line; apical sternite deeply angulately emarginat e medially, lancet with nine rows of regular teeth. Black with yellow markings; head black except yellow clj^p- eus, supraclypeal area, and scape; thorax yellow with the following parts black: Sternum, mesepi- meron, large spots on pre- scutum and scutum, lat- eral part of scutellar area, and metascutellum; ab- domen yellow with ter- gites 3 to 6 inclusive and median spots on following two black; legs, except the somewhat dusky fem- ora, yellow; \vings hya- line, venation pale brown with stigma somewhat darker and the cost a somewhat paler. il/aZ€(, 6).—Length 5 to 7 millimeters. Agree- ing with female in general structure; antenna long, the basal rami slightly less than half as long as half the flagellum; hypandrium dis- tinctly punctured, broadly rounded posteriorly; head and thorax more coarsely punctured than in the female; valves of
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Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
