178 



NOTES ON DIPTERA. 



In Corfu, during October and November, 1834, I captured 

 the same Siagona and Ditomi, also Clivina Fossor. 



The Rev. C. F. Kuper had captured several Semites in 

 Corfu ; also specimens of Ditomus Dama, and a variety of 

 D. obscurus, or distinct species. He may probably enlarge 

 the list of known Ditomi hereafter. 



3. Eggs of Mantis Religiosa and Chalcis. — During the 

 winter of 1834, I observed in Cephalonia, on grass, the 

 asphodel and other plants, particularly in marshes, brown 

 ovoid masses, resembling the cocoons of small moths, and on 

 examining them more closely, found that they were tough 

 brownish white, composed of layers of scales placed with great 

 regularity, and forming cells in series ; the cells contained a 

 yellowish liquid like the yolk of an egg. Having several 

 specimens, I detected in one a minute white grub in some of 

 its cells: this was in December, 1833. On the 17th of May, 

 happening to look at one which lay in my desk, I observed 

 four or five minute Chalcidce settled in it, and upon opening it 

 to discover whether they were the real occupants or intruders, 

 I discovered several emerging, or perfectly formed. They are 

 minute, about two lines in length, not including the ovipositor : 

 black, with part of the body and the feet reddish ; hinder legs 

 variegated, and thighs thickly incrassated ; eyes red ; antennae 

 clavate ; oviduct exserted, and twice the length of the body. 

 It appeared to make fully as much use of its hind legs as of its 

 wings, leaping to a considerable distance. In some specimens 

 the oviduct was four times the length of body and recurved. 

 On the 24th of May T found several young Mantes in the 

 desk ; and removing them, I placed one of the excrescenses 

 under a tumbler where it would not be disturbed, and in a few 

 days several young Mantes oratories made their appearance, 

 which removed all doubts as to the excrescence not being a 

 mass of eggs. The young Mantes devoured each other, and 

 the number diminishing, 1 let them out. 



Art. XIX. — Notes on Diptera. By Francis Walker. 



Planetes. N. G. Cecidomyice proximum. Fern. An- 

 tenna 12-articutatce, corporis dimidii longitndine ; articuli 

 longi, ceqnales, quasi bipartiti, basi rotundi, apice ovati ; 



