1914.] NATURAL SCIENCES OF PHILADELPHIA. 103 



scribed, having a short median line on the pronotum, very weak 

 incomplete pale pronotal lines and practically uniform limbs, without 

 blackish near the tympanum of the cephalic tibiae. 



The Victoria, Tamaulipas, individuals stand apart from the other 

 specimens, having an intensified pattern surpassing in contrast 

 anything else belonging to the species seen by us. Certain structural 

 peculiarities may compel the separation of these, as a distinct race, 

 at a later date when more Mexican material is accessible, so that the 

 following comments do not include them. The female from Maverick 

 County has a ver}- intensive coloration, with the dorsum of the 

 pronotum and lateral portions of the dorsum of the abdomen suffused 

 with garnet brown. The Laguna del Gato series is as a rule weaker 

 in color contrasts than Uvalde, Del Rio and Mission individuals of 

 both sexes, the type alone excepted. San Antonio specimens stand 

 about intermediate in color intensity. That color is of little geo- 

 graphic significance is shown by the fact that the two lots taken 

 closest together (about eighteen miles apart), i.e., Laguna del Gato 

 and Mission, are nearly as widely divergent as any examined. 



Distribution. — The range of this species extends from an undeter- 

 mined point on the Pecos River, probably near the New Mexican 

 line,^^ east to the vicinity of Corpus Christi and south as far as 

 Tamos, Vera Cruz. Mexico. Aside from the uncertain Pecos record 

 and that from Tamos, the range of the species is approximately 

 co-extensive wth the area called the Rio Grande Plain by Bray.^ 

 While the Pecos locality is more elevated, the highest points at which 

 we have noted the species (Del Rio and Uvalde) are at an elevation 

 of 1,100 feet, while the Corpus Christi and Tamos individuals were 

 taken almost at sea-level. It is probable that the Victoria, Tamauli- 

 pas, specimens were taken at a higher elevation than 1,100 feet, but 

 we have no definite information to this effect, the general region, 

 however, being near the 500 meter (approximately 1,640 feet) con- 

 tour. At Mission the species was taken just below the line of gravel 

 hills, while the Laguna del Gato series was taken in these hills. At 

 Del Rio and Uvalde it occurred on the rolling plateau country, while 



'9 The data with this specimen is "Pecos, Aug. 18." As the specimen came 

 to 8cudder through Uhler, we can, judging by analog}' with other specimens 

 similar!}- credited by Scudder, probably consider it one of Capt. Pope's collecting. 

 Capt. Pope's camps along the Pecos reached from above the New Mexican line 

 to considerably below the same, but the dates were all in March. The specimen 

 is in poor shape, having been dried from a liquid preservative. It is possible, 

 however, that the specimen was taken much later near the present town of 



^Botan. Gazette, XXXII, p. 116, fig. 6. 



