2 INSECUTOR INSCITI^ MENSTRUUS 



Many apparently new forms are represented in this material, 

 as was also the case in the Blattidse, as shown by Shelford's 

 report on that group. A number of described forms are species 

 not before reported from Peru, being extensions from the 

 north and east up the valleys of the Amazon and its tributaries. 



The proportion of new species recognized in the present col- 

 lection is approximately the same as that in the collection made 

 by the Yale Peruvian Expedition of 1911,^ but not a single 

 form described as new from these two collections is repre- 

 sented from both localities. This, however, probably signifies 

 but little, as these localities are some 200 miles apart and may 

 comprise very different regions. It may prove that many sec- 

 tions of this interesting portion of Peru, owing to their sepa- 

 ration by mountain ranges, etc., have each its quota of un- 

 described forms, some incipient and others well differentiated 

 from allied species. But many years will probably pass before 

 much information regarding such matters will be acquired. At 

 present we can truthfully say of the Orthoptera as a whole 

 what Shelford states of the Blattidae — we are still singularly 

 ignorant of the Peruvian fauna. 



Specific locality labels are not attached to the specimens 

 herein reported on, each bearing only the locality by longi- 

 tude and latitude, this in every case being 75° 17' W. of 

 Greenwich, 11° 3' S. lat. This locality, being common to 

 every specimen in the collection, is not repeated in the fol- 

 lowing pages, but in every case the date, usually the month 

 and year, rarely the day also, but often only the year, is 

 given. The name of the collector is also always stated. In 

 the case of species described as new the disposition of the 

 specimens is specifically stated. Paratypic material is 

 recorded by letters a, b, c, etc., in order to facilitate refer- 

 ence to particular paratypes when necessary. 



The sequence of arrangement is according to that of 

 Kirby's Synonymic Catalogue of Orthoptera and the refer- 

 ences quoted are usually confined to that work and to the 

 place of original description. 



Proc. U. S. Nat. Miis., vol. xliv. pp. 347-.3.'J7 (1913). 



