122 



PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



occiput smooth; eyes slightly depressed, circular in outline, rather 

 small, not prominent; antennse slightly exceeding the head and 

 thoracic segments in length, slender, the joints elongate, the 

 proximal joint with a slight lamellate expansion on the proximo- 

 internal portion. Pronotum narrow, the greatest width (supra-coxal) 

 contained about one and one-half times in the length, the cephalic 

 portion strongly constricted with the lateral margins bent ventrad 

 and the section A -shaped; lateral margins very slightly converging 

 caudad of the middle, the caudal margin truncate, a moderate median 

 transverse and a broken longitudinal sulcus present. Mesonotum 

 very slightly less than three times the length of the head and 

 pronotum together, arcuate in section, very slightly expanding 

 caudad, a very slight median carination present cephalad, the whole 

 mesonotum elongate sub-cylindrical. Metanotum including the 

 median segment four-fifths the length of the mesonotum, arcuate 

 in section except caudad where it is flattened, slightly expanding 

 caudad, a slight carination present on all but the median segment, 

 which latter is less than a fifth the length of the metanotum sensu 

 stricttore, with its greatest width (caudal) about equal 

 to the length and the cephalic margin much narrower 

 than the caudal. Abdomen slightly shorter than 

 the thorax, the five proximal joints subequal in 

 length and similar in character and width, each seg- 

 ment being about three times as long as wide and 

 very slightly widened at the extremities; sixth 

 joint about four-fifths the length of the fifth ; seventh 

 joint slightly longer than the sixth, narrow proxi- 

 mad, inflated dorsad, ventrad and laterad in the 

 distal portion; eighth segment quite short, tapering 

 caudad; ninth segment slightly longer than the 

 eighth segment, moderately inflated but hardly 

 expanded laterad, the distal margin A -shaped when 

 seen from the caudal aspect ; supra-anal plate visible as a point between 

 the bases of the cerci ; subgenital opercule 

 tubular, moderately large, reaching to the 

 distal margin of the eighth segment, the 

 apical valve small with its margin with a 

 slight projection; cerci about as long as the 

 ninth segment, straight when seen from the 

 side, moderately arcuate when seen from the 

 dorsum, rather robust, trifid, the apical 

 pair of processes less robust than the median one which is 



Fig. 3. — Pseudo- 

 sermyle tenuis 

 n. sp. Dorsal 

 outline of 

 head and pro- 

 notum. (X 4.) 



Fig. 4. — Pseudosermyle tenuis 

 n. sp. Lateral view of apex 

 of abdomen. (X 4.) 



