Oct.-Dec. 1921. 



The Canadian Fiei.d-Xatikai.ist 



129 



Family Ranidae. 

 Rana pipiens Sclireiber. Xot commoii. 



CLASS INSECTA 



Insects, while abundant on tiie island, 

 were not very common on thf* spit. Un- 

 fortunately, time did not allow the taking 

 of satisfactory notes, and also in several 

 instances the preservation was so bad as 

 to prohibit 'he accurate deteimination of 

 the species. Simie interesting forms were 

 encountered. 



Order Odonata 



Dragon flies were plentiful on tlie is- 

 land but the only species taken on the 

 spit was Nelialennin ircne Hagen (B.P. 

 Currie, U.S. Nat. Mus.) 



Order Neuroptera 



The following were taken on the spit 

 but their faulty preservation did net allow 

 of an accurate identification. 



Limnephilidae, 2 species; Phryganea, 1 

 species; Ephemeridae, 1 species (immat- 

 ure) (A. N. Candel, U. S. Nat. Mus.) 



Order Orthoptera 



A number of grasshoppers were taken 

 but all of them were in an immature con- 

 dition and all belonged to the genus Mela- 

 noplus. They were kindly identified for 

 me by Mr. Norman Criddle of Treesbank, 

 Manitoba, as follows .- — 



Melanoplus atlantis, M. daicsoni and M. 

 femur rubrum or angustipennis. 



Order Hemiptera 



The following were taken : 



Capsus ater, adult and young; Nabis sp. 

 nymph ; several specimens of family Corix- 

 idae not identified. (W. L. McAtee, Bio- 

 logical Survey, U. S. Nat. Mus.) 



Order Lepidoptera. 



Family Nymphalidae, Brenthis aphirape 

 var.dawsoni; Phyciodes tharos Drury; Ba- 

 silarchia dissipus Godart ; Basilarchia ar- 

 themis Drury var. lamina Fab. 



Family Papilionidae. Papalio machaon 

 (L) var. aliaska Scudder. 



Family Sphingidae, Snio inthus cerisi/i 

 Kby. 



Family Noctuidae, Acroinjfa (Apatela) 

 dactylina Grote; Iladcna allecto. 



P^amily Notodontidae, Phaeosia rimosa 

 Pask. 



Family Geometridae, Rheumaptera has- 

 tata L. 



In addition the larvae of Malasosoma 

 fragilis Stretch and a number of uniden- 

 tified Noctuids were collected. The stems 

 of a number of the Goldenrods were pa- 

 rasitised l)y Gno) wschema gallaesolklogi- 

 nis Riley. 



Order Diptera. 



Tlie Dipteia Avere kindly identified for 

 me by Dr. J. M. Aldrich of the United 

 States National Museum as follows: — 



Tabamis af finis, Kirby; Tabanus sep- 

 tenitihnalis, Loew ; ]\aenuitopota ameri- 

 cana, 0. S. ; Chrysops carhonaria, Walker; 

 ('h)ysops lupus, Whitney; Sphaeropho ia 

 scripta, L.; PJwnnia regina, Mg. ; Phor- 

 mia terrae-novae, R. D. ; Cynomyia cadave- 

 liua, R. D. ; Hylemyia tricho-dactyla, 

 Rond; Anthomyia radicum, L. ; Lispa sp. ; 

 SpathiopJwra fascipes. Beck; Sciomyza 

 simplex, Fall: Camptoprosopella vulgaris, 

 Fitcli ; Dicraeus incongruns. Aid.: Anaros- 

 toma marginata, Loew; FuceUia maritima, 

 Halliday: and a new genus and species of 

 the family Saprom\-zidae. The Tipulidae 

 and Chironomidae were not well enough 

 preserved for identification. 



Dr. Aldrich has called attention to 

 seveial interesting forms in the foregoing 

 list. 



The fly Ilydrophorus agalma Wheeler is 

 of considerable interest ; it has only been 

 recorded so far from Battle Creek, Mich., 

 the type locality, and fiom Ridgeway, Ont. 

 It belongs to a very abundant family the 

 Dolichopodidae. whose larval stages have 

 up to the present almost wliolly escaped 

 observation. In Xortli America so far the 

 larval stage of only one species, Thryp- 

 tiens muhleubergiae Johannsen, is known 

 and this is a stem-miner in plants very dif- 

 ferent from the present species. 



The specimens were taken in water only 

 a few inches deep on the north sid-e of the 

 spit where it joined the main ridge. The 

 bottom here is a mixture mainly composed 

 of sand with a little mud, and owing to its 

 sheltered position is practically undisturb- 

 ed. Unfortunately, owing to lack of time, 

 no satisfactory observations were made on 

 the life history of this form. The larvae 

 build for theinsclves cocoons of the sand 

 about 8 mm. l(»ng and in tiiese also they 

 pupate so tliat the cocoons collected con- 

 tained both larvae and pupae. How or 



