201 



"The Toothed-horned Fish-fly" {Ghauliodes rostricornis Ramb.) is fig- 

 ured in the larva, pupa, and adult, and notes upon its life-history are 

 given, adding, however, little to the observations recorded by Walsh 

 in the second volume of the proceedings of the Entomological Society 

 of Philadelphia. The Sagittaria Curculio {Listronotus latiusculus Boh.) 

 is also figured in the larva, pupa, and adult, and its breeding habits, 

 and the leaf and stalk and seed heads of the common arrow-leaf are de- 

 scribed. The Lesser Water-bug {Zaitha fluminea Say) is stated to feed 

 mainly upon the early stages of Dragon Flies. It also uses as food 

 univalve snails and May-fly larvse. Notonecta undulata is recorded as 

 feeding upon May-fly . larvoe and upon a species of Boatman {Gorisa 

 alternata Say). Donacia subtilis Kunze feeds upon a number of aquatic 

 plants and poUinizes Nuphar advena. His observations indicate that 

 the 13-spotted Ladybird (Hippodamia 13-pimctata) has aquatic tend- 

 encies, as he has commonly found it upon the leaves of aquatic jDlants. 

 This accords with our own experience, and Mulsant mentions the same 

 thing of this species in France. The stages of Benacus griseus and 

 Belostoma americanum are described and those of the former species 

 are figured. Altogether this is one of the best and most interesting 

 (entomologically) of the experiment station bulletins so far issued. 



Ultimate Larva of Piatypsyiius.— We copy in the present issue from 

 Entomologica Americana for February the description of an interesting 

 larval form of this curious and anomalous beaver parasite, and would 

 again call attention to the wonderful superficial resemblance to certain 

 Mallophaga of the genera Nirmus and Trichodectes. In some species 

 of the latter genus the mandibles are bidentate, as in this larva, while 

 the caputal characters, the loss of the anal cerci, and the general form of 

 body so depart" from the earlier larva that the resuablance to the Mal- 

 lophaga is still more striking. But none of the lice have the mouth- 

 parts, otherwise, as in this larva, nor the single jointed tarsus.— C. V. R. 



Oviposition of Hypoderma bovis.— The interesting facts narrated in this 

 number by Dr. Cooper Curtice bring unexpected confirmation of what 

 we stated in the last issue as to the eggs of this Ox Wormal being fast- 

 ened externally, and would seem to indicate that, exceptionally at least, 

 if not normally, the newly-hatched larva is taken in through the mouth 

 and can live internally during the first stage. Whether these young 

 larvfe in the cesophageal walls and under the pleura eventually perish 

 or succeed in working beneath the skin is as yet to be ascertained, but 

 we see nothing improbable in the latter course. These young larvae 

 arc doubtless taken from one animal to another through the habit 

 which cattle have of licking each other, and it is possible that in older 

 cattle in which the hide is thick this mode of entrance of Hypoderma 

 is more common than in younger animals. We have examined Dr. 



