94 Insects, 



from one side of the vessel to the other, interlacing with each other at 

 neai'ly regular intervals and producing a series of intersections, (fig. d). 

 The tissue investing these muscular bands, or in other words, the cellular 

 coat of these vessels, on examination with a power of 400 linear, ap- 

 pears well developed and exhibits a fibrous structure, and the fibres 

 intersect each other diagonally ; it is covered with numerous ramify- 

 ing vessels, which contain dark granules like those from pigmental 

 cells, which well exhibit the molecular movement so common to all 

 minute globular bodies. 



Each trunk, about its middle, is about ^ of an inch in diameter, 

 and in a space equal in breadth to one diameter, there are about fif- 

 teen bands ; each band is therefore about ^^ of an inch in diameter, 

 and presents a dotted appearance, in which it very much resembles in 

 structure the fibres of the muscular tunic of the oesophagus, and those 

 placed immediately underneath the true skin which have been before 

 described. The dotted appearance is so constant in the fibres of 

 these Hirudinidae, as to become characteristic of the muscular tissue 

 in this order of animals. John Quekett. 



(To be continued). 



Insects. 



Note on the Medic Egger (Lasiocampa Medicaginis). The larva 

 of this moth is not unlike that of the oak egger [Lasiocampa Quer- 

 cus), but the ground colour, instead of being brown, as in that insect, 

 is of a dingy yellow ; the pupa is enclosed in a yellow cocoon. Two 

 caterpillars were found on the cliffs at Teignmouth, and one at Bovey 

 Heathfield ; one of them died, one of the others produced a male and 

 the other a female moth. The male is rather smaller than the male 

 fox moth (Z. Riibi), and is of a bright reddish brown colour; the up- 

 per wings have a white spot in the middle between two white streaks, 

 the one near the tip of the wing is well defined, the other more indisj 

 tinct ; an obscure whitish streak passes through the middle of the se^- 

 cond pair. The female is larger, of an uniform dull reddish browni 

 with a white spot in the centre of the upper wings. — JV. B. Hal 

 Jordan : Teignmouth, December, 1842. 



Note on the Capture of Therajuniperata, Having noticed on the 

 evening of the 7th of November, 1842, this insect flying about the ju- 

 niper-trees which abound on Mickleham Downs, I visited the spot 



