152 PROCEEDINGS OF THE ACADEMY OF [1898. 



by the entirely yellow lips and nasus, the rear of the head mostly 



yellow as in serpen- 

 tinus, the absence of 

 the median and the 

 isolated position of 

 the antehumeral 

 stripes on the thoracic 

 dorsum; a mere black 

 line only, no band, 

 on the second lateral 

 thoracic suture, no 

 6 



Fig. 7. 

 Occiput of Ophiogomphns reductus n. sp. 9 to show 

 its two processes ("horns"). ME margins of the 

 eyes, x 25. 



intermediate band ; the dorsal yellow spots on 3 



rounded at their hind ends. 



longer and 



Subfamily CORDULEGASTERIN^J. 



5. Cordulegaster bidentatus Selys. 



Selys, Ann. Soc. Ent. France (2) i, p. 109, 1843. Ann. Soc. Ent. Belg., 

 xxxi, p. 34, 1887. 



One male, " below 5,000 f", agrees with bidentatus in its append- 

 ages (very nearly), in the number of cells (three) in the anal tri- 

 angle, and in those color differences which distinguish bidentatus 

 from insignia. It differs from bidentatus in having an apical infe- 

 rior yellow spot on abdominal segment 1, and a twin apical yellow 

 spot on the dorsum of 4-6, a yellow spot on each side of the apex of 

 7-9, and a basal yellow spot on each side of 10 ; all the yellow spots 

 on the abdomen are larger than in bidentatus. Abdomen 55 mm., 

 hind wing 46. The most eastern record for bidentatus hitherto ap- 

 pears to be Asia Minor. 



Subfamily LIBELLULIN^E. 



6. Pantala flavescens Fabricius. 

 Two females, " below 5,000 f." 



7. Libellula quadrimaoulata L. 



Four males, four females " below 5,000 f." 



Only in three of these, all females, does the black basal spot of 

 the hind wings extend into the triangle, and even in these three it 

 does not completely fill the triangle. These females and one male 

 may be referred to the variety prenu b ila, although the brown cloud 

 below the pterostigma is in no case intense. One of these females is 

 also interesting in that it approaches basilinea McLach. (Ann. Mag. 



