■239— 



Entomological Society of Washington. Meeting held February lOtli, 

 1387, — Mr. Mann gave a review of bis work on tbe Biblit'grupby of EconomicEn 

 tomology i)artly done by him privately iu former years and partly ('nring his 

 ••onnection with the U. S. Entomological Commission and the U. S. Department 

 of Agriculture. After several interruptions and changes in the plan the work is 

 now partly completed and ready for publication. 



Mr. Schwarz exhibited au umlescribed species of 7Vk//(>(;u(.s from Michigan, 

 and described the peculiar characters of this genus which are indicative of an 

 aquatic mode of life. He read in translation Perris's account of the life history 

 of Phytobius velatas which lives in all stages under water on the leaves of Myi'i- 

 ophyllum spicalum. 



Mr. Schwarz read a paper on the sexual characters in the N. A. species of 

 Anaspis. There is great discrepancy in the descriptions of these characters 

 given by Dr. LeConte and Mr. J. B. Smith, while his own observations led him 

 to disagree with both authors. He hail examined males of 4 species and finds 

 that the abdomen is never excavated but provided with two long filiform appen- 

 dages arising from the apex of the 4th ventral segment. In most specimens, 

 however, the appendages are closely applied to the ventral surface so that their 

 real nature is readily overlooked, and the abdomen presents then in a most de- 

 ciptive manner the appearance of being excavated. The appendages appear to 

 be movable in an up and downward direction but are not capable of lateral 

 movement. This structure is modified in ihe differi nt species and affords a 

 much better criterion for the distinction of the species than those now used in 

 the tables. 



Mr. Schwarz related a conversation he recently had with Dr. Horn regarding 

 the stridulation of Ilarpalns cnHtpiiosus. It appears that Dr. Horn distinctly 

 heard the sound in a specimen when this was at liberty and undisturbed, and 

 this fact explains tbe failure of otiier observers who always tried to make the 

 [larpaliis stridulate when the specimens were handled. In all other stridulating 

 Ooleoptera the sound is more frequently heard when the specimens are fright- 

 ened or handled or otherwise in a state of excitement. 



ERRATA. 



Page 55, line 4, from bottom, for horbaccous, read herbaceous. 



" 70, " 12 of first column, for Saerda read Saperda. 

 ' " 79, for Pjfrrh/iUia in explan. of figure, read Pyrrhavrtlu 



" 106, line 21, for Agnotemyia, read Agnotomyia. 



•' 179, " 17, for useless, read useful. 



" " '* 35, for peste, read pests. 



*• 190, " 18, for straighed, read straight. 



" 199, " 9, for mormornia, read mormonus. 



" 204, " 25, for Scorpionidal, read i^corpionidaK. 



"209, " 5, for mjority of Cicindel, read maJDrUy iif (JiciudeJa. 



•' 221, " 16, foT mendicta, read niendicata. 



«• 223, " 19, for dentiadaiu, re&d denticulala. 



For noteb as to errata see pages 137 & 164 a. 



