116 RECORDS OF THE AUSTRALIAN MUSEUM. 



It is not easy to decide if the present species is distinct from 

 Tri(jnniidns biirnettiruff, Attejns,^- as nothing is known of the 

 sexual characters of the latter form, the type of which is a 

 female. Attems' species seems to be larger. 



Also Triguniuhiif c.onn)ia, Attems, ^^ {g only known from a 

 female specimen ; but the diameter is considerably larger and 

 the description of the integuments do not correspond with those 

 of S. diyitidi(s. 



S. diijifiihi^ probably bears much resemblance to Tn'iji»iii(h(s 

 taryioiiii, Silvestri, but may be readily distinguished by the 

 presence on the pi'ozonite, of the horse-shoe-shaped punctures, 

 and by the shape of the first pair of copulatoiy appendages. 



Silvestri's description is as follows-* : — 



" Triijoniulns taryimiii, sp. n. Q Color fusco-rufus, margine 

 " postico somitorum, capite, antennis pedibusque rufo-pallidis. 

 " Caput laevigatum, medium sulco in facie interrupto, circa 

 " labrum poris 2 -f- 2. Oculi subcirculares ocellis c. 20 sat 

 " distinctis. Antennae articulo sexto longiore et crassiore, 

 "collum non superantes. Somita : collum lateribus angustatis 

 " antice emarginatis, postice fere recte truncatis ; somita 

 " coetera tota laevigata sub poi'is tautum ante suturam striis 

 " nonnullis. Fori permagni. Soniitum anale cauda vix 

 " angulata valvulasanales non superante, valvulis immargiiiatis, 

 "sternito lato triangulari. Pedes sat breves. (^ Pedes 1-2 

 " paris iiicrassati, infra spinosi ; pedes paris 3-4 articulo prinio 

 " pj'ocessu magno interne recte truncato, externe rotundato 

 " acuto, pedes paris 5 articulo primo processu parvo instructo. 

 " Organum copulativum (fig. 28) lamina ventrali lamina antica 

 " vix longiore, lamina postica magis breviore apica triangulari 

 " par internum (fig. 29). Somitorum numerus 52 . Long. corp. 

 "ni/m 70; lat. corp. m/m 6. Hah. Cairns (Queensland)." 



22 Attems — In Scmon, Zool. Forschungsrciscn in Australien, 1898 

 p. 513. 



-3 Attems — Luc. cit., p. 513. 



-'* Silvestri— Bull. Soc. Hntom. Ital., xxix., 1S97, p. 229. 



