PROCTOTRYPIDJS. 199 



prey on the wheat-flies by inserting their eggs in their larvae, 

 on gall-midges, and gall-flies, and on fungus-eating flies. In 

 Europe, species of Teleas lay their eggs in those of other 

 insects, especially butterflies and moths and hemipters, where 

 they feed on the juices of the larvae growing within the egg, 

 coming out as perfect Ichneumons. We probably have many 

 species of these insects in this country. They usually occur in 

 great numbers where they are found at all. They are almost 

 too small to pin, and if transfixed would be unfit for study, 

 and should, therefore, be gummed on mica, or put into small 

 vials with alcohol. 



In Proctotrupes the antennae are long, feathered, twelve- 

 jointed. The fore-wings have the beginning of a cubital cell, 

 and two longitudinal veins on the posterior half. The abdo- 

 men is spindle-shaped and very acutely pointed, the terminal 

 joints being tubular in their arrangement, 

 and thus, as Westwood states, approaching 

 the Chrysididce. An unknown species 

 (Fig. 133) we have taken at the Glen, in 

 the White Mountains. 



The head of Diapria is horizontal and 

 longer than broad ; the ocelli are moved forward on to the 

 front edge ; the long, filiform antennae have a projection on 

 the under side, with the basal joint much elongated ; in the 

 male they are thirteen or fourteen-jointed, with one joint less 

 in the female. The wings are without stigma or veins. The 

 abdomen is long, oval, pedicelled. In Europe, D. cecidomyi- 

 arum Bouche is parasitic on the larvae of Cecidomjda arte- 

 misiae. Esenbeck considers that this genus is also parasitic on 

 the earth-inhabiting Tipiulidai. 



Gonatopus is a wingless genus, with the head A'ery broad, 

 transverse, and the front deeply hollowed out, while the ten- 

 jointed antennae are long, slightly clavate, and the thorax is 

 much elongated, deeply incised, forming two knot-like portions. 

 Gonatopus lunatus Esenbeck, found in Europe, is one and a 

 half lines long. 



Ceraphron has tlie antennae inserted near the mouth ; they 

 are elbowed, and eleven-jointed in the male, and ten-jointed in 

 the female. The abdomen has a very short pedicel. The fore- 



