172 NEUROPTERA OF NORTH AMERICA. 



4. M. illota! 



Mesothemis illota Hagen! 



Luteous ; mouth yellowish, front rufous above ; thorax luteous, 

 with luteous hair, the sides each with two white spots at the feet, 

 which are margined beneath with fuscous ; feet luteous ; abdomen 

 rufous, appendages rufous; wings hyaline, veined with luteous, 

 the base, and anterior margin as far as the nodus, flavescent ; the 

 anterior wings with one rufo-fuscous, basal streak, the posterior 

 ones with a double one ; pterostigma luteo-fuscous ; membranule 

 whitish. Male. 



Nine antecubitals ; seven postcubitals ; three discoidal areolets. 



Length 37 millim. Alar expanse 56 millim. Pterostigma 2J 

 millim. 



Hob. North California; Mexico. 



I saw a female from Ajan (Sea of Ochotsk), which was a little 

 larger ; the alar expanse was 62 millim. : the anterior margin of 

 the wings all flavescent, no basal streaks, the thorax upon each of 

 the sides with two oblique white stripes ; the feet blackish-fuscous ; 

 is it the same species ? 



Libellula gilva Hagen, from Columbia, is very similar to M. 

 illota : I am in doubt whether it is different. 



5. M. attala. 



Libellula attala Selys. Poey, Ins. Cuba, p. 445. 



Blackish- smoky; base of the abdomen inflated, the dorsum with 

 obsolete rufous spots each side; feet blackish; wings hyaline, 

 veined with black, anterior ones with a small, basal spot, upon the 

 posterior wings the spot is larger and produced almost to the 

 origin of the triangle, fuscous ; pterostigma moderate, brownish- 

 olive. (From the description of De Selys Longchamps.) 



Fifteen antecubitals ; nine postcubitals ; three discoidal areolets. 



Length 42 millim. Alar expanse 70 millim. Pterostigma 3 

 millim. 



Hob. Cuba. 



This is Libellula annulata Rambur, 78, 65, in part. 



6. M. mithra. 



Libellula mithra Selys. Poey, Ins. Cuba, p. 446. Libellula annulata Ramb. 

 Neuropt. 78, 65 (in part). 



Yery much like the preceding species, but the posterior wings 



