1835.] I"* IMeinert. 



unci bestehen normal wie dieses aus Coxa, Trochanter, Femur, 

 unci einem 3-glieclrigen Tarsus." 



1. Fam. SCUTIGERINI. 



Lamina? dorsales alternae manifesto, in medio incisae, alternse evanidae. 

 Pedes longissimi, tarsis multi-articnlatis, unguis singuli, processus binis 

 setiformibus instructi. 

 Antennae setacea?, articulis plurimis composito. 

 Oculi ocellis plurimis compositi. 

 Spiracula nulla. Stomata septem. 

 Palpi maxillares quadriarticulati ungue nullo. 

 Laminae dorsales segmenti septimi atque octavi coalita. 

 Sternum metameri quarti bipartitum ; setis octo longis armatum. 

 Coxae pedum posteriorum simplices (poris execretoris nullis). 



The fifteen segments of the body have each one pair of limbs 

 and differ but very little among themselves with regard to the 

 size of the laminae ventrales ; but, on the contrary, the difference 

 between the dorsal part of the segments is very great, the lami- 

 nae dorsales of six segments, i. e., the 2d, 4th, Gth, 9th, 11th and 

 13th, not being fully developed, but only represented by a mem- 

 branous fold which is attached to the front edge of the lamina 

 dorsalis of the following segment, while the laminae dorsales of 

 the eighth and ninth segments coalesce into a common large 

 plate. Thus the number of distinct, well-developed segments in 

 the Scutigerini is only eight. With regard to the second family 

 of this tribus, the Lithobiini, I must remark that the same six 

 laminae dorsales, which in the Scutigerini are evanescent, in the 

 Lithobiini become abruptly smaller than the remaining laminae,- 

 while the two large well-defined laminae dorsales of the seventh 

 and eighth segments in the Lithobiini correspond with the large 

 coalesced lamina of the same segments in the Scutigerini. 



The posterior edge of the first seven well-developed laminae 

 dorsales is deepl}' excavated in the median line, and in this ex- 

 cavation a narrow chitinous ring encloses the orifice (stoma) of 

 a duct into which a number of glandular tubes open from both 

 sides. A controversy of some length has lately taken place with 

 regard to the function of these stomata and of the glandular 

 organs situated behind them, which are either supposed to be 

 spiracles and tracheae, or regarded only as mere glands. The 

 second view has been several times supported by the author, 

 and I will only refer to my last paper in the controversy : " De 



