OF WASHINGTON, VOLUME XVI, 1914 167 



H . nalans Lee., the type species, was found by Mr. G. R. Crotch 

 abundantly at Los Angeles in the river. LeConte says: "Mr. 

 Crotch informs me that this very singular insect resembles in ap- 

 pearance some of the species of Limnebius." 



1874. D. SHARP, On a new family of European Coleoptera, (Ent. Mo. 

 Mag. vol. xi, 1874, pp. 101-104). Reproduces LeConte's article 

 in full; corrects LeConte's statements regarding number of tarsal 

 joints (only 3-jointed) and number of antennal joints (only 8 

 joints). He becomes aware that several species of this genus oc- 

 qur also in Europe and describes H. crotchii from Madrid, Spain, 

 which had hitherto been considered a species of Limnebius. 



1876. REV. A. MATTHEWS, (Essay on the genus Hydroscapha Lee. Lon- 



don, 20 pp., 1 plate). This paper I have not seen but it is referred 

 to by LeConte and Horn (1883). 



1877. In the second edition of the Catalogus Coleopterorum Europse the 



authors in ignorance of American literature credit the genus Hy- 

 droscapha to Dr. Sharp and place it as a kind of subfamily in the 

 Scaphidiidse. 



1883. In the third edition of the same Catalogus, the genus Hydroscapha 

 is again credited to Dr. Sharp but placed between the Spha?ridiida3 

 and Trichopterygidae as a kind of subfamily. 



1883. CL. REY, Sur le genre Hydroscapha. (Rev. d'Entom. n, p. 84) 

 Gives parallel descriptions of the genera Limnebius and Hydrosca- 

 pha, and comes to the conclusion that Hydroscapha is closely al- 

 lied to Limnebius of the family Hydrophilidse. 



1883. DAVID SHARP, Un mot sur le genre Hydroscapha. (Revue d'Ento- 



mol. n, p. 117) Replies sharply to Mr. Rey and accuses him of 

 total ignorance of the literature on Hydroscapha. The latter 

 should be considered either as a new family or as an aquatic tribe 

 of the Trichopterygidae. 



lss3. LECOXTE and HORN, (Classification of the Coleoptera of North 

 America, p. 180) place the family Hydroscaphidse between the 

 Trichopterygidae and Sphaeriidse, and refer as follows to Matthews' 

 (1876) paper. "The Rev. A. Matthews has since published a 

 memoir on the genus in which he shows that the affinities are 

 strongly towards Trichopterygidae with tendencies as indicated by 

 Dr. LeConte toward Hydrophilidso." 



1884. REV. A. MATTHEWS, Synopsis of the North American Trichopteryg- 



idso (Tr. Am. Ent. Soc. xi, pp. 115-116) gives a description of the 

 genus Hydroscapha and the species H. nalans Lee. among the fam- 

 ily Trichopterygidae. 



1889. FLACH, (Verh. Zool. Bot. Ges. Wien. vol. xxxix, p. 523). I failed to 

 see this reference. 



1899. L. GANGLBAUER, (Die Kafer von Mitteleuropa, in, part i, pp. 332- 

 335) Recognizes LeConte's genus Hydroscapha as a separate family 



