242 ENTOMOLOGICAL NEWS. [September, 



rial from Florissant, Col. Sixty species were taken into consideration. 

 About half the genera are extinct, not including half the species. The 

 neuration of some of the newly-described genera were explained by 

 drawings on the black-board. In reply to a question the speaker stated 

 that in most cases the neuration was exceedingly well preserved. Mr. 

 Calvert said that, in his account of the local Odonata, he had been led to 

 make a careful study of the thorax. The key to such a study he had 

 found in the anatomy of the thorax in the genera Calopteryx and Hetcs- 

 rena. The speaker gave at length the anatomy of this part of the Odonata, 

 and aided his discourse by black-board drawings. C. F. Seiss was duly 

 elected a member of the Section, and Mr. W. H. Patton, of Hartford, 

 Conn., and Dr. H. G. Griffith, of Manayunk, associates. 



Dr. H. SKINNER, Recorder. 



JUNE 12, 1893. 



A regular stated meeting was held on this evening. Mr. Welles in the 

 chair. Eleven members and associates present. A communication from 

 the New York Entomological Society suggesting the appointment of a 

 field meeting on July 4th was received, and, on motion, a committee con- 

 sisting of Messrs. Johnson, Skinner and Laurent, was appointed to reply 

 to the same, and make such arrangements as deemed best. Mr. Johnson 

 exhibited for Dr. Skinner a chrysalis of Feniseca tarquinens, which some- 

 what resembles a monkey's face. The larvae is carnivorous, and feeds on 

 plant lice. The specimens were reared by Miss Emily L. Morton. Mr. 

 Calvert described the characteristic wing-veining of the two suborders of 

 the ODONATA, Zygoptera and Anisoptera, and illustrated by black-board 

 sketches the apparent manner in which the triangle of the latter was de- 

 rived from quadrilateral of the former PHILIP P. CALVERT, 



Acting Recorder. 



The following papers were read and accepted by the Committee for 

 publication in ENTOMOLOGICAL NEWS : 



STEM GALL ON EPHEDRA NEVADENSE. 



By C. H. TYLER TOWNSEND. 



On Oct. 10, 1891, I found near Joblin's Ranch, San Andres 

 Mountains, on stems of Ephedra nevadense, numbers of small, 

 elongated galls, from which the occupants had emerged, as was 

 shown by a small hole in each gall. This is the only case that 

 has ever come under my notice of an insect affecting this plant. 

 Whether it possesses some acrid principle, by virtue of which it 

 is distasteful to most insects, I cannot say. 



The gall may be cecidomyidous, or it may be hymenopterous. 

 I think it more probable that it is the former. It may be described 

 as follows: 



