1895.] Entomology. 1115 
the claim that the proposed groups® are natural ones. The nature of 
the differences by which the Monocheta are maintained as distinct may 
be shown by briefly indicating the most important diagnostic features 
of the different orders with which they have been confused. Complete 
parallel descriptions are in preparation. 
Order MEROCHETA. 
Median lobe of gnathochilarium with styliform processes. 
Seminal openings of males appearing as perforations of the coxæ of 
the second pair of legs. 
Suborders Polydesmoidea, Craspedosomatoidea, Callipodoidea. | 
Order Monocueta. 
As defined above. The affinities, as far as these can be indicated, - 
seem to place this order between the Merocheta and the Diplocheta. 
Suborders Stemmatoiuloidea, Xyloiuloidea. 
Order DIPLOCHETA. 
Seminal openings through paired ducts inserted at the base of the 
second legs. 
Suborders Spirostreptoidea, Cambaloidea, Iuloidea. 
Order ANOCHETA. 
Labrum with a median sinus and an even number of teeth. 
Segments 1-5 with one pair of legs each. 
Seminal opening single, median, located at the base of the second legs ; 
external seminal ducts entirely wanting. 
Suborder Spiroboloidea. 
Family STEMMATOIULID& Pocock. 
Stemmiulide Pocock, Journ. Linn. Soc., XXIV, p. 477. 
Genus STEMMATOIULUS Gervais. 
Stemmiulus Gervais, Ann. d. Soc. Entom. d. France; 2 series, II, 
1844; 3 series, II, p. 70, Pl. V, fig. 11 (1844). 
Type St. bisculatus (Gervais and Goudot) ibid. 
Locality —Columbia, temperate regions. 
eh N. Y. Acad. Sci., Vol. IX, p. 8, 1895. There seems to be no good reason 
which separate them are both fundamental and constant, 
