227 



Wood (H. P.). Eradication o£ Lice on Pigeons.— L' .5. Dept. Agric, 

 Washington, D.C., Circ. 213, April 1922, 4 pp. [Received 5th 

 October 1922.] 



Since the pubHcation of a bulletin recommending sodium fluoride 

 for pigeon lice [R.A .E., B, vi, 14], a method has been perfected by which 

 the lice on a flock of pigeons can be eradicated by one treatment. 

 Choosing a warm summer day, each bird should be dipped in a solution 

 of 1 oz. commercial sodirmi fluoride, with | oz. hard laundry soap in 

 one U.S. gal. water, until it is soaked to the skin. The head should be 

 ducked for a moment before the bird is freed. Dusting with sodium 

 fluoride gives a high degree of control though not complete eradication ; 

 one advantage of this method is that it can be used at any season. 

 Insecticides in the birds' bath water have been found quite ineffective. 



The above treatment was eftectual against Lipeiiriis baculus, N., 

 and Goniocotes compar, N., the two most abundant species ; no doubt, 

 it would prove equally successful against the other lice that are 

 commonly recorded in the United States, namely, Colpocephaluni 

 latum, N., Menopon longicephalum, KelL, and Goniodes damicornis, N. 



Walker (E. M.). Some Cases o£ Cutaneous Myiasis, with Notes on 

 the Larvae oJ Wohlfahrtia vigil (Walker).—//. Parasitology, 

 Urbana, ix, no 1, September 1922, pp. 1-5, 3 plates. 



Two further cases of cutaneous myiasis in young infants, caused 

 by the Sarcophagid, Wohlfahrtia vigil, Wlk., are recorded from Ontario 

 [R.A.E., B, ix, 1]. These larvae, instead of entering through one of 

 the natural orifices, as in the case of W. niagnifica, cause lesions scattered 

 over an otherwise healthy and uninjured skin. The bucco-pharyngeal 

 sclerites of the first and second instars are described, in order to facihtate 

 recognition of any stage of the parasite. 



A further case is recorded from Philadelphia of an infant that 

 was severely infested with fly larvae, but of a different species, closely 

 resembling the first instar of Mtisca domestica. Descriptive notes and 

 figures of these larvae are given in the hope that their determination 

 may be possible at some time when the earliest stages of the Muscid 

 larvae are better known. 



.McDaniel (E.). Cockroaches : Methods of eradicating this trouble- 

 some Pest. — Michigan Agric. Expt. St a. Qtrly. Bull., East Lansing, 

 V, no. 1, August 1922, pp. 38-39. 



The cockroaches that are domestic pests in the north-eastern United 

 States are Blatella germanica, Blafta orientalis, Periplaneta americana 

 and P. anstralasiae. The first is the most widely distributed. A 

 successful poison bait consists of three cups of Unseed meal, mixed 

 with water into a thin mash, one cup of molasses (not corn syrup), 

 and one yeast cake softened in a cup of water and allowed to stand 

 until it ferments ; to this 2 tablespoonfuls of lead arsenate should be 

 added when mixed . This bait is most eftecti ve where the cockroaches 

 have little or no water. As the period of fermentation is short the 

 bait should be renewed every few days. Powdered borax may be 

 substituted for sodium fluoride (which, though the best method of 

 destro^ang this pest, is poisonous to man) and can be mixed with one- 

 fourth as much fresh pyrethrum. 



