4 PEOCEEDIN-GS OF THE IsTATIONAL MUSEUM vot. 72 



but the transverse sutures sliown in Figure 22 could be seen rather 

 clearly. 



Clothing. — Chaetotaxy is doubtless as important for the separation 

 of species in this genus as it is in Ga/in'podea. 



The macrochaetae are unilaterally fringed or feathered. The head 

 bears numerous short simple setae. The lateral setae of the thoracic 

 terga (fig. 23) are constant in form, size, and position. On most of the 

 abdominal segments there are postero-dorsal setae, as in Figure 24 ; a 

 little in advance of each postero-lateral angle are two macrochaetae. 



Beside the base of each stylus is a lateral series of 5 setae (figs. 13, 

 15) ; on the mesal side, except on the first abdominal segment, are 6 

 setae in both sexes (fig. 15). 



Near the posterior border of each of the first seven urosterna 

 are two fringed setae, one on each side of the median line, in both 

 sexes. 



A comparison of the setal characters shows many differences be- 

 tween this species and fimhriatipes. 



The thorax and abdomen are clothed densely with scales, dor- 

 sally and ventrally, but scales are almost absent on head, antennae, 

 legs, and cerci. The scales (figs. 25-30) are variable in form and 

 size, but are relatively large and mostly broad, with a comparatively 

 few strong striae. 



Maximum length of specimens: Male, 2.5 mm.; female, 2.8 mm. 



Margarita Swamp, Canal Zone, June 28, 1923, with Anoplotermes 

 species in termitarium in tree stump, J. Zetek and I. Molino (Z. 

 2154&). 



Syntypes.—C^ii. No. 40381, U.S.N.M. 



Genus GASTROTHEUS Casey 



GASTROTHEUS LEPISMOIDEUS (Folsom) [New combination] 



AteUira lepismoidecu Folsom, 1923. 



Professor Silvestri has kindly informed me that this termito- 

 philous species, which I described from British Guiana, belongs in 

 the genus Gastrotheus., which he redescribed from one of the types. 



Nine males and ten females, Rio Chinilla, Canal Zone, August 

 19, 1923, with Nasutitermes ephratae Holmgren, J. Zetek, collector 

 (Z. 2214). 



COLLEMBOLA 



Genus ACHORUTES Templeton 



ACHORUTES (SCHOTTELLA) CAECUS, new species 



Plate 4, figs. 31-38 



Wliite. Eyes absent. Postantennal organ (fig. 31) with com- 

 monly 6 (often 5, and rarely 4 or 7) peripheral tubercles in a rosette. 



