INSECTA. 
273 
species of Ichneumons^ in which the dark-coloured wings arc 
adorned with lighter spots, or bullae/^ on several of the veins. 
Tlie minute agreement of these spots in position throughout the 
insects which show them conspicuously, and the almost uni- 
• versal occurrence of certain pale spots, or bulla 3 ,^^ throughout 
the family Ichneumonidse, are adduced by the author as evi- 
dences of a unity of coloration, which, in his opinion, can only be 
accounted for by the assumption of a genetic connexion between 
the various species exhibiting these characters. 
Wollaston, T. V. Notes on Alpine Entomologv* Zooloarist, 
1866, pp. 313-317. 
t Anatomical and Physiological. 
Brandt, Alexander. Mittheilungen iiber das Ilerz der In- 
secten und Muscheln. Bull. Acad. Imp. St. Petersb. 
tome X. pp. 552-561. 
In this paper the author describes the action of the heart in 
certain common insects, and in Anodonta and Unio, and refers 
especially to the influence of external excitants upon it. The 
heart in both forms is automatic. The lateral muscles of the 
heart in Insects only play a subordinate part in pulsation, and 
are certainly not the sole agents of diastole. The heart in In- 
sects and the ventricle in Unio and Anodonta stand, to a 
certain degree, in a physiological aspect, between the heart and 
intestine of Vertebrata, 
Claus, C. Beobachtungen iiber die Bildung des Insecteneies, 
Zeitschr. fiir wissensch. Zoologie, Band xiv. 42-54, 
Tafel 6 (1864). 
[Observations bn the formation of the egg in Insects.] 
Landois, II . Beobachtungen iiber das Blut der Insecten. 
[Observations on the blood of Insects.] Zeitschrift fiir 
wissensch. Zoologie, Band xiv. pp. 55-70, Tafeln 7-9 (1864). 
Landois, Leonard. Ueber die Function des Fettkbrpers. [On 
the function of the fatty body.] Zeitschrift fiir Avissensch. 
Zoologie, Band xv. pp. 371-372. 
Landois, H. & L. Uebsr die numerische Entwicklung der 
histologischen Elemente des Insectenkbrpers. [On the nu- 
merical development of the histological elements of the 
Insect-body.] Ibid. pp. 307-327 (1865). 
Plateau, Felix. Sur la force musculaire des Insectes. Bull. 
■ Acad. Roy. Bclg. 2^’ ser. tome xx. pp. 732-757, and xxii. 
pp. 283-308; Ann. & Mag. Nat. Hist. 3rd ser. vol. xvii. 
pp. 139-141, and xix. pp. 95-99. 
In this paper the author describes some experiments made by 
him on the force Avhich various insects (chiefly beetles) are 
capable of exerting in traction, pushing; and flight. He dc- 
1866. [vol. III.] T 
