78 apouus. 



mandibles, and another on the basal joint of the fiagellum ; 

 otherwise like the other sex. 



This species is extremely rare in this country ; the only spe- 

 cimens known for many years, were taken by Dr. Leach in 

 Devonshire, and placed in the National Collection. Mr. Rndd 

 captured it at Parley Copse, Hants ; in 1S4-1 I captured a female, 

 on the 20th of August, at Weybridge, and in 1S45. also in 

 August, a male at the same locality; Mr. (bant took a single 

 specimen at the same place in 1854, since which, I am not aware 

 of its having been captured. 



Genus 3. APORUS. 



Aporus, Spin. Ins. Lig. ii. 33. 30. 



Head subrotund, a little wider than the thorax ; eyes lateral 

 and ovate ; the stemmata in a triangle on the vertex ; the antenna? 

 inserted forward on the face at the base of the clypeus; the 

 labium concealed. Thorax elongate, the prothorax as long as 

 the metathorax ; the wings inserted in the middle at the sides 

 of the thorax; the superior wings with one marginal and two 

 submarginal cells; the marginal cell small; the first submarginal 

 elongate, twice as long as the second, which is subquadrate, and 

 receives both the recurrent nervures, the first at about one-third 

 from its base, the second uniting with the second transverse 

 cubital nervure ; legs of moderate length, the anterior tarsi not 

 ciliated. Abdomen elongate-ovate. 



From the above characters it will be seen that the species 

 described in Shuckard's Essay does not belong to the genus 

 Aporus ; the above characters are those given by Spinola, with 

 some additions : the essential character, the remarkable neura- 

 tion of the wings, is carefully described by Spinola, as well as 

 the place of their insertion. The insect described by Shuckard 

 I consider to be only a variety of P. pectinipes ; I have several 

 times met with it where P. pectinipes was plentiful. My opinion 

 also obtains considerable support from the remarks of Shuckard 

 on the P. pectinipes (P. crassicornis of his Essay) : — " The Rev. 

 C. Bird showed me a remarkable variety of it, captured at Burg- 

 field by S. W. Haslehurst, Esq., of Trinity College, Cambridge, 

 which has upon the left side the nervures of Aporus." Should 

 my opinion prove incorrect, the species must be referred to the 



