. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. XVIIl] BRITISH SPECIES 341 Abd. much constricted at 3; large blue and small yellow spots on all segments. App. sup. 4, inf. 3; shaped as in fig. 170 b. O ahd 53—55, hw 43—44, j9 o juncea Linn. b. Ae. cyanea short distance. Frons with a T-mark. Miiller. c. Ae. isosceles Miiller. Thorax with narrow dorsal and lateral blue Original. stripes. Abd. much constricted at 3; 1—2 mostly blue, rest with numerous large blue spots. App. sup. 4, inf. 2, shaped as in fig. 170 c. ? abd 43—45, hw 38—40, pt 4. Abd. not constricted, spots sm
. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. XVIIl] BRITISH SPECIES 341 Abd. much constricted at 3; large blue and small yellow spots on all segments. App. sup. 4, inf. 3; shaped as in fig. 170 b. O ahd 53—55, hw 43—44, j9 o juncea Linn. b. Ae. cyanea short distance. Frons with a T-mark. Miiller. c. Ae. isosceles Miiller. Thorax with narrow dorsal and lateral blue Original. stripes. Abd. much constricted at 3; 1—2 mostly blue, rest with numerous large blue spots. App. sup. 4, inf. 2, shaped as in fig. 170 c. ? abd 43—45, hw 38—40, pt 4. Abd. not constricted, spots smaller, some yellowish; apps. 4, leaf-like. Rare; Northern. June. 7. Ae. mixta Latreille. ^ abd 44—45, hw 37—39, pt 3. Wings hyaline, C brown. yl« of/i?t;asin No. 8. ^?/es closely contiguous. i^ro?is with T-mark. Thorax with small dorsal yellow specks and broad lateral yellow bands. Abd. slightly constricted at 3; fairly large blue spots on each seg. App. sup. 4-2, inf. 2-5, shaped as in fig. 170 d. ? abd 44—46, hw 38—40, pt 3-5. No dorsal specks on thorax. Abd. not constricted, spots smaller, blue-green and yellow; apps. 5, slender, leaf-like. Rare; South-eastern. Aug.—Oct. 8. Ae. cyanea Miiller. .^ abd 54—58, hw 45—50, pt 2-5. Wings hyaline. Aa of hw 3-celled (fig. 171 b), rarely 4—5-celled. Eyes moderately contiguous. Frons with T-mark. Thorax with large oval yellowish-green dorsal marks and broad yellow lateral bands. Abd. constricted at 3, with fairly large blue and smaller yellow spots. App. sup. 5, inf. 2, shaped as in fig. 170 E. ? abd 55—58, hiv 48—52, jit 3. Dorsal marks of thorax yellow. Abd. not constricted, colours as in cj ; apps. 4-5, leaf-hke. Fairly common; Southern. July—Oct. 9. Ae. isosceles Miiller ( =Ae. rufescens Vanderlinden). (J abd 47—49, hw 41—42, pt 3. Base of hw deeply saffroned. Aa of hw 3—6 cells with large dark memb. (fig. 171 c). Eyes closely contiguous. Frons without a T-mark. Thorax brown with yellow latera
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