135 



however, is somewhat longer than those immediately preceding 

 it ; or is divided, thus forming the siipernumary segment. The 

 four wings are transparent and irridescent but somewhat smoky. 

 The costal margin of the wing is yellow towards the base ; the 

 sub-costal vein, however, which is closely united to the costa is, 

 like the other veins, dark, pitchy-brown. There is a more or less 

 well marked smoky spot in the third discoidal cell extending from 

 the origin of the posterior vein. The venation of the wings is 

 represented in Fig. 3. In the male the 3-ellow markings are much 



more extended than in the other 

 .sex, the following named parts 

 being of that color : The mouth 

 parts, except the tips of the 

 mandables, which are dark- 

 brown ; a spot on the clypeus ; 

 a narrow margin between the 

 compound eyes and the mouth 



Fig. 3.— Venation of wings of Cephus. parts; the VCUtral aspCCt of 



the thorax ; the legs, excepting a dark band on the caudal 

 aspect of the coxae and femora (the tibiae and tarsi are some- 

 times brown or smoky instead of yellow) ; the membrane at 

 the ba.se of the abdomen ; on the ventral side of the abdomen the 

 caudal margin of each .segment ; on the dorsal side of the abdo- 

 men a more or less well marked spot on each side of the first 

 and second abdominal segments ; a broad band occupying the 

 caudal three-fourths of the third and fifth .segments ; a narrow 

 band on the caudal margin of the sixth .segment ; which may be 

 more or less interrupted, forming .spots on the back and sides ; 

 and the latero-caudal angles of the seventh .segment. 



In the female there is a yellow spot at the l)a.se of the mandi- 

 bles ; the maxillary palpi, except the terminal portions, are 5'ellow ; 

 the tilMae and tarsi var}' from light yellowish-brown to dark 

 smoky-brown ; tho.se of the hinder pair of legs usually being 

 darker the markings of the abdomen are the same as in the male, 

 except that the yellow .spots and bands are usually smaller, and 

 are .sometimes entirel}' wanting on the ventral aspect. 



Note 2 : Descriptio7i of the Larva of Cephus pygmaeus. — The 

 larva is of a yellowish milky-white color, with the head brownish, 

 the tips of the mandibles and the eyes black. When fully grown 

 it measures from g mm. to 14 mm. in length ; but in spinning the 



