1908.1 



NATURAL SCIENCES OP PHILADELPHIA. 



399 



G-RYLLID^. 

 NEMOBIUS ServiUe. 

 Nemobius neomexicanus Scudder. 



• This species was taken at light at Tucson (July 23, 1 9 ) and Yuma 

 (July 27 and 28, 3 9) and was decidedly scarce wherever it was 

 encountered. The Tucson specimen is appreciably larger than the 

 Yuma individuals. 



GRYLLUS Linnseus. 

 Gryllus personatus Uhler. 



At Tucson this species came to light in great numbers the evenings 

 of July 23 and 26, a series of twenty males and eighteen females being 

 collected. 



Size as usual exliibits a considerable range of variation, while several 

 males are of a strongly megacephalic type. 



As the proportions of the caudal femora and ovipositors and the 

 measurements of the tegmina may prove of use to future workers, they 

 are tabled below. 



Proportions of caudal femur and ovipositor in eighteen females from 

 Tucson. 



or. 



for Microcenfrum Scudder, Kirby has been confused by the synonymy of the 

 species and selected Steirodon thoracicus ServiUe as the t5^e, which was not 

 included in Microcentrum by Scudder; the latter's Microcentrum thoracicum 

 having been proposed independently, not being the same as thoracicus Ser\dlle or 

 thoracica Burnieister. Tliis is shown by lurby in his arrangement of the syn- 

 onymy; but in selecting Ins type he has overlooked it. In consequence it is 

 necessary to select as the type of Microcentrum a species originally included in 

 the genus and affiliatum Scudder (= rhombifolia Saussure) is so selected. This 

 is in accordance with Article 30 of the Revised International Code of Nomen- 

 clature. 



1^ This name must be used in place of laurifolium of authors ; laurifolium of 

 Linnseus, as shown by lurby {Synon. Catal. Orth., II, p. 456), being a Stilpno- 

 chlora. 



