100 [October, 



unterdessen vollstaiidig ausgebildeten Mundorgane zu verschlucken 

 beginnt * * * ,Jie * Larve liegt [jetzt] schrau- 

 benformig auf der Bauchseite zusammeugerollt bis sie das Chorion 

 zerreisst und ins Preie gelangt." The Zarcea embryo, at any rate, does 

 not get into the loop position by any molar movement of this sort. 

 "When the posterior end of the growing embryo has reached the remote 

 end of the e^g, it is bent ventrally on itself, and so groics forwards till 

 the tail comes to be in contact with the head. As the length of the 

 embryo still continues to increase, the head is withdrawn to about the 

 middle of the straight or up])er side of the egg, and the larva, about 

 to hatch, lies in a spiral, with the tail opposite the head on the other 

 side of the body. It turns its sharp mandibles towards the shell, bites 

 at it and draws it in till it is pierced, and, by means of a foot thrust 

 through the opening, draws the flexible chorion still more within the 

 power of the mandibles, which soon effect an opening large enough 

 for its escape. This ingrowth ventrally of the caudal end of the 

 embryo appears to be not uncommon in the Arthropoda, where the 

 length of the embryo exceeds that of the shell ; and occurs even in the 

 case of the globular egg of Astncus, as described by Huxley (The 

 Cray-fish, p. 203). In the case of an embryo making such a revolution 

 in the egg, as that described b}^ Kowalevski, the head would occupy 

 two different positions in the same end of the egg, relatively to two 

 opposite sides, before and after the revolution. The egg of Bumia 

 cratcegata would be specially favourable for making this observation ; 

 the shell at the cephalic end being distinguished by an ellipsoidal 

 ridge : the pointed end of the ellipsoid corresponds with the position 

 of the head of the larva just before hatching ; and, of course, the 

 rounded end to that of the tail. While the embryonic venter is still 

 external, the relative positions of these parts, on Kowalevski's prin- 

 ciples, should be just the reverse. 



Milford, Letterkenny, Ireland 

 Uh Septemler, 1882. 



I 



Capture of Crahro gonaqer, $ , in Gloucestershire. — I took a ? of the above 

 rare species of Crahro, at Woottou-under-Edge, Glos'ter, on the 29th August, this 

 year. I found it, together with considerable numbers of C. podagricus, on the 

 common garden parsley. This is, I believe, the first record of the capture of the $ 

 in this country, although I have taken the $ several times near the same spot. In 

 comparing my specimen with the description of gonager, given by Thomson in bia 

 " Hynicnoptera Scandinavia'," it appears to have the pale ring of the posterior tibia 

 unusually narrow, and the scape of the antennse entirely black. — Vincent E. 

 Perkins, 54, Gloucester Street, South Belgravia : Wth Septemher, 1882. 



A 



