Heterogijiia and Fossorial HijmcnopUra. 249 



4. lutaria, Fab. Mant. i. p. 273, ^ ([{finis, Kirb., 

 Shuck., &c. 



Differs from the above in having the metathoracic area 

 diagonally and rugosely striate, instead of clathrately 

 rugose ; the petiole without the long line of hairs 

 beneath, and the head and thorax less closely punctured; 

 it is also not quite so densely covered with hairs, and has 

 the 2nd abdominal segment black at the base. Length 

 15—20 mill. 



Hah. — Littlehampton, Chobham, Low'estoft, Southend, 

 Deal ; August, &c. 



LAEEID.E. 



(li) 1. Mandibles with a deep incision in their outer 



margin. 



(•1) 2. Tliree submarginal cells . . . . . . . . Tachijtes. 



(Q) ;3. Two submarginal cells. 



(5) 4. The outer one petiolated . . . . . . . . Miscoj)lnis. 



(i) 5. The outer one not petiolated. . .. .. .. Dinetus. 



(1) ti. Mandibles simple .. .. .. .. .. Astata. 



Tachytes, Pans. (PL VII. fig. 19). 



Krit. Eevis. ii. p. 129. 



A well-marked genus, and easily recognised. One of 

 our British species, 2\ pectinipes, somewhat resembles a 

 small Astata, but the externally dentate mandibles at 

 once distinguish it ; anterior wings with three sub- 

 marginal cells, the 2nd cell receiving both recurrent 

 nervures, the third very long and narrow, and much 

 produced at its lower apical angle ; radial cell appen- 

 diculated. 



(2) 1. Body with tile base red .. .. .. .. fectinipes. 



(1) 2. Body entirel\- blnck .. .. .. .. .. ini'color. 



1. pectinipes, Linn. Syst. Nat. ed. x. vol. i. p. 570. Fig. 

 Panz. Faun. Germ. 89, 13, and 106, 13, $ . 



Black, 1st and 2nd, and sometimes part of the 3rd, 

 abdominal segments red. Head and thorax very closely 

 and deeply punctured, face below the antennte and along 

 the sides of the eyes with silvery golden hairs ; abdomen 

 finely punctured and covered M'ith exceedingly short grey 

 hairs, which give it a silvery appearance at the sides ; 

 apical segment in the <? narrowly truncate, and somewhat 



