144 THE CANADIAN ENTOMOLOGIST. 



collection of the Kansas State University. From this examination I am 

 enabled to give further differences between these two species which are 

 very closely allied. 



The face in incaiia in the female is distinctly more concave than in 

 //ION f ana. In iucaiia the face recedes from the apex of the antennal 

 callosity to half way to the epistoma ; from that point the outline of the 

 face projects outwardly at the same angle that the upper half recedes 

 inwardly. In inontana the outline of the face on the upper half is exactly 

 the same as in i/icana, but on the lower half the outline is an almost 

 perpendicular line. Besides this the front is somewhat narrower in 

 inca/ia, the spots of the abdomen are much larger and the pile is con- 

 siderably shorter. 



43. Tropidia mai)iillata^ Loew, Centur. i, 68, 1861. 



Four male specimens of this species were taken by the writer at 

 Cedar Bluffs, Nebraska, in April, on flowers of Prunus virginicus. This 

 is, I believe, the only record of the capture of this species since the 

 publication of Loew's first Century in 1861. The locality given in that 

 case was Illinois. 



LIBELLULA DEPLANATA OF RAMBUR. 



BY JAMES G. NEEDHAM, CORNELL UNIVERSITY, ITHACA, N. Y. 



In December, 1896, Mr. Adolph Hempel sent me from Orange Co., 

 Fla., some full-grown dragonfly nymphs which were apparently not to be 

 referred to any of our known genera. At my request he undertook to 

 breed some of them, and soon had imagoes of the species named above. 

 In the letter which accompanied his bred specimens he recorded some 

 careful observations, which are so interesting and valuable I deem them 

 worthy of permanent record. The following account of the habits of this 

 species is from Mr. Hempel's letter : 



This species frequents small ponds and the borders of adjacent 

 woods. Imagoes fly, when undisturbed, quite leisurely. They will 

 hover over one spot, then dart a i&w feet aside and hover again 

 and again. The males are often found in low places about 

 ponds, resting on the ground with wings aslant downward and forward. 

 Sometimes they rest on reeds or snags in the water ; sometimes out in the 

 pine woods several hundred yards from water; they may be found resting 

 on the sand warmed by the sun, on logs or on trees. 



