from the Mesilla Valhy, New Mexico. 397 



inadequate, but I have a male from Las Cruces collected by 

 Prof. C. H. T. Townsend, and identified as lanosa by Mr. Fox. 

 I also have a male of the same collected by I\Ir. Alfred Holt 

 on the College Farm, May 2, 1895. I associate with these 

 male lanosa four females — one on Ciesalpinia falcaria. May 18, 

 1896 {CkU.), two on mesquite, May 13, 1895 [Alfred Holt), 

 and one caught on May 17 by the late Mr. S. Steel, all from 

 the Mesilla Valley. 



The following notes on lanosa will be found useful : — 



Gentris lanosa, Cr. 



(? . — This resembles the male of ccesalpinice, var. rhodopus, 

 in size, general structure, and appearance, and differs at a 

 glance from the male of Hoffmanseggice ; but it is distin- 

 guished at once from ccesalpinioi or its var. rhodopus by its 

 narrow front, in which character it is like the male of Hqff- 

 manseggice. The clypeus is yellow and the eyes are green, 

 as in rhodopus, but the clypeus is necessarily narrower, owing 

 to the shape of the face. The first segment of the abdomen 

 is covered with pale hairs, but the other segments show no 

 pale hair-bands. The hairs at the tip of the abdomen are 

 dark or, at most, slightly pallid, not conspicuously pale as in 

 ccesalpinice and rhodopus. The scape in my examples is 

 dark, though Cresson's description reads otherwise. 



? . — I had mixed what I now consider to be female lanosa 

 with female Hoffmanseggice, and probably would not have 

 separated them but for the necessity of finding females for 

 the very different males of these species. The female lanosuy 

 however, average decidedly larger than the Iloffmanseggice, 

 and the second abdominal segment, as well as the first, is 

 delicately pruiuose. The claws also are noticeably larger and 

 the black upper margin of the clypeus is broader, so that the 

 yellow or orange is reduced to the shape of a half-circle. 



The following tables may be found convenient : — 



Females. 



Clyi)eus crimson 1. 



Clypeus yellow or orange, its upper border more 

 or less black 2. 



1. Length over 14 millim. ; legs black ccesalpinice, Ckll. 



Length under 14 millim. ; femora and tibiae 



rufous rhodopus. Ckll. 



2. Second abdominal segment pubescent lanosa, Cr. 



Second abdominal segment bare Hoffinanseggiee, Ckll. 



Males. 



Front broad 1. 



Front narrow 2. 



