OCR Text |
Show 254 II. Sixth antennal joint as long, or very nearly as long, as the first. f 2. spinax Dohrn. Blackish; eighth segment of antennae pale at tip; base and extreme tip of wings and whole of tarsi pale yellow; third, fourth, and fifth dorsal segments of abdomen conspicuously prolonged laterally in a backward curve, tapering and pointed: forceps of male with the tip bearing a backward-directed hook, and the middle of inner border denticulate. Body l lmm; forceps 4mm. Mexico. b. Abdomen but little or not at all expanded in the middle; all the dorsal segments before the last of nearly equal length in both sexes. FOEFICULA. Whole body more or less flattened, generally long and slender; antenna usually a little more than half as long as the body, 10- 14- jointed, the joints cylindrical, scarcely larger at the apex than at the base, seldom as little as four times as long as broad; tegmina present; wings usually present; first tarsal joint a little longer thau the third, the second short, but dilated apically and lobate, passing beneath the third joint; second and third abdominal segments with lateral plications; forceps of varied construction. ( Wings protruding beyond the tips of the tegmina- b. ' \ Wings wanting, or shorter than the tegmina h * ( A large pale spot at base of tegmina c. ' ( Tegmina concolorous or vittate d. . ( Wings unicolorous; forceps slender 2. bimaculata. \ Wings bicolorous; forceps stout 3. Percheroni. ( Male forceps with an inward and upward directed basal d. l lamella 4* lugubri6. ( Male forceps with no such lamella e. { Middle legs very much nearer the fore legs than the hiud legs ./. Middle legs only a little nearer the fore legs than the hind legs h- Male forceps attingent at extreme base.. 5. auricularia, Male forceps widely separated at extreme base g. i Tegmina longitudinally vittate 6. Umiata. \ Tegmina concolorous 7. toUeea* Inner edge of male forceps with a post- median tooth. 8. exilis- Inner edge of male forceps with no distinct post- median tooth » • Inner edge of male forceps sharply and profusely denticulate 9. California Inner edge of male forceps with a single sharp basal tooth 10. pulchelk. Forceps of male long, but shorter than abdomen, only a little curved 11. aculeata* Forceps of male longer than abdomen, but. little curved 12. rujiceps. Forceps of male short, strongly bowed 13." vara. '•< |