852 Pomona College Journal of Entomology 



LES ZOOCECIDIES DU NORD DE L'AFRIQUE 



C. HOWARD 



Ann. de la Soc. Ent. de France. Vol. LXXXI, 1912. 



This is a paper of 128 pages. It takes up the galls on the various groups 

 of plants beginning with the Algtv and including conifers and many of the 

 other groups of plants where galls are better known. There are two plates 

 and over two hundred small text figures. 



TRO.MBIDIID^ 



.ANTONIO BERLESE 



Redia, Vol. VIII, 1912. 



Practically all of this number is taken up with the 290 pages of this paper. 

 There are a number of line cuts and one double colored plate. 



FEEDING HABITS OF SCORPION FLIES 



In the Entomologist, for November, 1912, F. W. and H. Campion consider 

 the feeding habits of scorpion flies. Their observations show that these insects 

 are carnivorous, they feed on dead animal matter, they do not catch and devour 

 living prey. 



DIE SEHORGANE DER LARVA UND IMAGO VON DYTISCUS 



MAEGINALIS 



KARL GtJNTHER 



Zeit. f. Wiss. Zool. C. Bd. HI, 1912. 



The stemmata show two sorts of receptive cells, horizontal rods with small 

 sense cells and vertical ones with large visual cells. The rods are, in general, 

 hollow structures bound together by the distal ends of sense cells. Near the 

 six stemmata on either side of the larval head are the so-called eye-spots, 

 "Augenfieck, " described for the first time. These are considered to be visual 

 organs. They have vitreous bodies, true rods, and are connected by a nerve 

 with the optic ganglion. The stemmata last through metamorphosis, so that in 

 the imago they are without lens and vitreous body. With the development of 

 tile retinula the central cell of the eight moves basalwards, from the seven 

 riidinl retinula cells in the proximal row. It does not form a part of the 

 rhalidom, which is the product of seven cells. 



Iris and retinal pigment were distinguislied, tliey have their origin from 

 different cell elements, the pigment cells and the retinal cells. 



W. H. 



