180 



PSYCHE. 



[November 1S91. 



BIBLIOGRAPHICAL NOTES.— I. 



BY SAMUEL HENSHAW. 



Biologia Centrali-Americana. — DlP- 



tera. Vol. I. By Charles Robert von Osten 



Sacken. 



gen. sp. 



Cecidomyidae, 1SS6, pt. 49, p. 1. 1 1 



Mycetophilidae, 1SS6, pt. 49, p. 1-2. 3 6 



Bibionidae, 1S86, pt. 49, p. 2-5. 3 22 



Simulidae, 1SS6, pt. 49, p. 5. 1 3 



Blepharoceridae, 1SS6, pt. 49, p. 5. 1 1 



Culicidae, 18S6, pt. 49, p. 5-6. 2 5 



Tipulidae, 1SS6, pt. 49, p. 6-20. 12 38 



Rhyphidae, 18S6, pt. 49, p. 20-22. 1 1 



Stratiomyidae, 1SS6, pt 49-50, p 



22-43. 2 7 9 2 



Tabanidae, iSS6,'pt. 50-51, p. 43-60. 8 74 



Chiromyzidae, 18S6, pt. 51, p. 60. 1 1 



Leptidae, 18S6, pt. 51, p. 60-62. 3 13 



Xylophagidae, 18S6, pt. 51, p. 62-63. 1 2 

 Acanthomeridae, 1886, pt. 51, p. 



63-68. 2 3 



Midaidae, 1886, pt. 51-52, p. 68-73. 2 17 



Nemestrinidae, 1SS6, pt. 52, p. 73-74. 2 3 

 Bombylidae, 1886-87, Pt- 52-55, 



p. 75-162. 24 107 



Therevidae, 1887, pt. 55, p. 162-163. 2 7 



Cyrtidae, 18S7, pt. 55, p. 163-167. 6 8 



Asilidae, 1887, pt. 55-57, p. 167-213. 39 167 

 Dolichopodidae, 1887, pt. 57, p. 



213-214. 4 12 



Empidae, 18S7, pt. 57, p. 214-216. 2 10 



The above enumeration of 147 genera and 

 593 species includes, in addition to those 

 contained in the descriptive part of the work, 

 all previously recorded from Mexico and 

 Central America. 



Species of the following genera are fig- 

 ured : — 



Tipulidae. — Epiphragma, 1. *Tany- 

 premna, 1. 



Stratiomyidae. — Hermetia, 1. 



Tabanidae. — Chrysops, I. Tabanus, 1. 



Acanthomeridae. — Acanthomera, 3. 



Bombylidae. — Anthrax, 2, 3. Aphoeban- 

 tus, 3. Argyramoeba, 2. Eclimus, 3. Exo- 



prosopa, 1. Hyperalonia, 1, 2. *Isopenthes, 

 2. *Lepidanthrax, 2. Pantarbes, 3. *Stonyx, 

 2. 



Cyrtidae. — Ocnaea, 3. 



Asilidae. — *Cophura, 3. Diogmites, 3. 

 Laphria,3. Lastaurus, 3. Mallophora, 3. 

 Proctacanthus, 3. 



The three plates contain 66 figures of 50 

 species; new genera are marked (*) ; the 

 figure following the name of the genus de- 

 notes the number of the plate. 



CLOUDS OF INSECTS. 



On the night of Aug. 27th, Hornellsville, 

 N. Y., was visited by a vast shoal of insects 

 which came from the south, and, as long as 

 observed, moved in a northerly direction. 

 They made their appearance about sunset and 

 on the following morning they had entirely 

 disappeared. They were minute in size, pos- 

 sessed four membranous, glossy wings, and 

 the abdomen was separated from the thorax 

 by a narrow constriction. They probably 

 belonged to the same order as the bees and 

 wasps. The afternoon preceding the even- 

 ing of their appearance was sultry and op- 

 pressive, and the sky was unclouded. Just 

 before dusk a vast mound-like cloud became 

 visible south of the city. It had an apparent 

 altitude of about two thousand feet and was 

 of the cumulus type. It shone with a rosy, 

 semi-metallic lustre due to reflections from 

 the western sky. A few minutes later the 

 insects began to come from the direction of 

 the cloud. It would be impossible to esti- 

 mate their numbers. Probably there were at 

 least hundreds of millions. There were 

 places where they flew as thick as hail, and 

 like hail in a common direction. When they 

 had fully arrived the electric lights became 

 the chief centres of their activity. They 

 swarmed the stores and flew about the lights 

 until exhausted, when they fell to the floors 

 in such numbers that they were swept up by 

 the merchants. 



Hornellsville is situated in a valley extend- 

 ing approximately north and south. Now 



