■S8 THE CANADIAN ENTOMOLOGIST. 



treatment of horse manure, so as to reduce to a minimum the number of 

 house flies. Practical inferences to be drawn from this important investi- 

 gation are that house flies, which occur everywhere and have a remarkable 

 capacity for flying or being carried long distances in railway trains or 

 other conveyances, are capable of carrying the germs of fatal diseases from 

 place to place, and are therefore a source of great danger. In view of 

 this, steps should be taken to restrict as much as possible their opportuni- 

 ties for breeding, by rendering their favourite habitats unsuitable for the 

 purpose. To this end all such exposed matter in which they could breed 

 should be removed or covered up as quickly as possible. Ashes, lime, or 

 even dried earth, are usually easily obtainable, and will answer well for 

 this last-mentioned purpose. Steps should be taken to prevent as much 

 as possible the entry of flies into hospitals, houses, kitchens and pantries, 

 by means of screens on doors and windows, and all flies found inside such 

 protected buildings should be destroyed by a constant use of fly-papers 

 or pyrethrum insect powder. J. Fletcher. 



FOUR NEW SPECIES OF HIPPISCUS. 



BY SAMUEL H. SCUDDER, CAMBRIDGE. MASS. 



Since the publication, in Psyche for 1S92, of my study of the 

 Orthopteran genus Hippiscus, a few additional species have come to 

 light, and they are herewith described. The first species belongs to the 

 subgenus Hippiscus, the others to the subgenus Xanthippus. 



Hippiscus citrinus, sp. nov. — A compact and stout though rather 

 small form. Head rather stout and full, broad above, luteo-testaceous, 

 more or less infuscated above, dark fuscous in a stripe behind the eyes, 

 the carinas more or less infuscated ; summit of head obscurely punctate, 

 the vertical scutellum obscure and, with the foveolae, much as in H. 

 compactus ; frontal costa broad, flat, punctate, depressed at the ocellus, 

 where it is slightly enlarged, but otherwise subequal ; antennae ferruginous 

 in basal, blackish in apical half. Pronotum stout, somewhat constricted 

 mesially and considerably expanded on the metazona, the disc nearly 

 plane with rather heavy rugae forming the scutellum of the prozona, the 

 metazona nearly smooth, but with a few slight rugae and granulations ; 

 median carina very uniform and not prominent, but on the metazona 

 slightly arcuate as seen laterally ; lateral canthi tolerably distinct on the 

 metazona (but rounded posteriorly), considerably surpassing the median 



