236 Dr. Schleiden on the Anatomico-physiological 



aris ; 2"* basi ad apicem latescens; S"» et sequentes lineares ; 4"* 3**brevior, 

 5** longior ; clava fusiformis, articulo 5" pauUo latior et duplo longior : tho- 

 rax ovatus : prothorax transversus, brevissimus : mesothoracis scutum uni- 

 sulcatum, fere planum, longitudine paullo latius ; parapsidum suturae re- 

 motse, optime determinatae ; scutellum subrotundum, bisulcatum : meta- 

 thorax transversus, brevis : petiolus brevissimus : abdomen ovatum, supra 

 planum, subtus carinatum, apice acuminatum, thorace paullo longius et la- 

 tius : pedes graciles, simplices, subsequales : alae latse ; nervus ulnaris Im- 

 merali duplo longior, radialis nullus, cubitalis sat longus ; stigma minutum. 



Sp. 1. Cirr. Teridae, Fem. Nigro-cupreus, an tennis picece, pedes fusco- 

 fulvi, femora nigro-cuprea, alee Umpides. 



Nigro-cupreus : oculi et ocelli rufi : antennae piceas ; articuli l"set2'^*ni- 

 gri ; pedes nigro-cuprei ; trochanteres picei ; genua flava ; metatibiae apice 

 fulvse ; mesotibire fulvae, fusco cinctse ; propedum tibiae fulvas, tarsi fusci ; 

 meso- et metatarsi fusci, basi fulvi : alae limpidse ; squamulae piceas ; nervi 

 proalis fulvi, metalis flavi. (Corp. long. lin. 1 ; alar. lin. 2|.) 



Found by Dr. Greville, near Edinburgh. 



Fem. C. Sotadi affinis ? corpus angustum, convexum, obscurum, scitissime 

 squameum parce hirtum : caput transversum, breve, thorace paullo latius ; 

 vertex latus; frons abrupte declivis : antennae graciles, extrorsum cras- 

 siores, thorace paullo longiores ; articulus 1"* sublinearis ; 2"* longicyathi- 

 formis ; 3"% 4"% et 5"* lineares, subaequales ; clava longifusiformis, acumi- 

 nata, articulo 5° plus duplo longior : thorax ovatus : prothorax transversus, 

 brevis : mesothoracis scutum longitudine paullo latius ; parapsidum suturae 

 optime determinatae ; scutellum subrotundum : metathorax transversus, 

 mediocris : petiolus brevissimus : abdomen fusiforme, laeve, nitens, supra 

 depressum, subtus carinatum, apice attenuatum et acuminatum, thorace an- 

 gustius et multo longius ; latera subcompressa : pedes simplices, subaequales : 

 alae mediocres ; nervus ulnaris humerali multo longior, radialis nullus, cu- 

 bitalis brevis. 



Sp. 2. Cirr. Brunchus, Fem. Ater, abdomen nigro-cupreum, antenna 

 piceee, pedes Jlavi, femora nigra, aliB limpidce. 



Ater : oculi et ocelli rufi ; antennae piceae, basi nigrae : abdomen nigro- 

 cupreum : pedes flavi; coxae nigrae; trochanteres picei; femora nigra; 

 tarsi apice fusci : alae limpidae ; squamulae piceae ; nervi proalis fusci, me- 

 talis flavi. (Corp. long, lin, 4 ; alar. lin. \^.) 



Found by Dr. Greville, near Edinburgh. 



XXVI. — Hints on the Anatomico-Physiological Differences in 



the Organization of Stems. By Dr. M. J. Schleiden.* 



I HAVE been constantly surprised in reading the numerous 



controversies on the differences between monocotyledonous 



and dicotyledonous stems, to find that, in general, they con- 



* Translated from Wiegmann's Archiv, part 3, 1839. 



