jj^gj,,,.j ZOOLOGY PSEUDO-NEUEOPTEEA AND NEUKOPTEEA. 587 



De Selys's L. croceiijennis^ aud the fact tbatMr. Uhler at once objected to 

 my former opinion about its identity with his L. saturata contirms the 

 statement made above. 



L. flavida, Hagen, Synop., 156, 15. 



In my last report I mentioned a fragment of this species from the 

 Yellowstone, aud I find the same statement in my note -book. The frag- 

 ment not being at band, other specimens would be required to corrobo- 

 rate the habitat. This species is known from Pecos Eiver, Western 

 Texas. 



L, composita, Hagen, Hay den's Eeport, 1872, 728. 



I have seen a single female only, which is fully described in the 

 report, and provisionally placed in tlie genus Mesotheni-is, near M. cor- 

 riqjta. Considering the large size of L. composita, the small, rounded 

 lobe of the x)rothorax, the enlarged apical segments of the abdomen, 

 and the form of the vulvar laminaj the species should probably be 

 placed in Libellula proper. 



Habitat. — Yellowstone. 



MESOTHEMIS. 



21. collocata, Hagen, Synop., 171, 3. 



I named this species after a fragment in very bad condition in the 

 Yellowstone Eeport. The abdomen of a female was in one bottle and 

 the remaining x^arts of the insect in another; besides this, the Yellow- 

 stone collection contained some pressed specimens not fitted for scientific 

 use. I therefore consider my identification somewhat dubious, if I had 

 not received in the mean time two pairs from San Diego, Cal., by Mr. 

 Crotch, which, belonging probably to the same species, confirm my 

 opinion. A full comparison is even now not possible, as the male type 

 of 31. collocata is a teueral one, and the two males from San Diego very 

 mature ; but the females agree exactly with the rudiment from Yellow- 

 stone. This species is very near to M. simpUcicolliSy but different in 

 the black superior appendages of the male; the inferior one is yellow, 

 a character not stated in my Synopsis. In the younger female, the 

 appendages are yellowish, but the quadrangular, black, dorsal si)ot on 

 the segments 4 to 10 is wanting ; only the sutures and margins of all 

 segments are black. Though convinced of the rights of the species, 

 more material would be needed for a full scientific description. 



M. simplicicollis, Hagen, Synop., 170, 1. 



In my last report I mentioned a single female from Ogden, Utah ; at 

 present I am more doubtful, the sx^ecimen being very imperfect. Prob- 

 ably it belongs to the foregoing species. M. simplicicoUis is very com- 

 mon everywhere in the Western Territories east of the Eocky Mount- 

 ains from the northern border to Florida, Cuba, Texas, and Mexico. 



No specimen is known from jDarts west of the Eocky Mountains. 



M. illota, Hagen, Synop., 172, 4. 



A female in my collection from the Yellowstone, but imperfect, with- 

 out the head, belongs probably to this species, which is common in 

 California from the Gulf of Georgia to Cape Mendocino and San Diego. 

 The L. (jilva from. Columbia is very similar, x>erhaps identical. 



M. cornqjta, Hagen, Synop., 171, 3. 

 This species is very common in Texas, California, and is discovered 



