578 APHELOCHIRINA. 



Abdomen very broad ; posterior angles of the 3rd, 4th, 5th, and 

 6th segments produced into an acute spine, on each segment larger 

 than on the preceding one. 



Species 1. APHELOCHEIRUS JSSTIVALIS, 



NATJCORIS ^STIVALIS, Fab. E. S. iv, 66, 2 (1794) ; Coqueb, 111. t. 10, fig. 



4 (1799) ; Fab. S. R. Ill, 3 (1803). 



APHELOCHEIRUS ^ESTIVALIS, Westw. Mag. Nat. Hist, vi, 228 (1833) ; 



Introd. Mod. Class, i, frontisp. fig. 7 

 (1839) ; ii, 466 (1840). 



APHELOCHIRA -ESTIVALIS, Fieb. Gen. Hydr. 15, t. 1 D (1851) ; Europ. 

 Hem. 103 (1861). 



Broad-oval, slightly convex, smooth, dull, light brown. 



Head, except the base, ochreous. Antennas ochreous. Eyes 

 piceous. Rostrum pale ochreous. 



Thorax. Pronotum ; sides broadly ochreous. Elytra : Corium ; 

 (undeveloped) the abbreviated anterior margin broadly, posterior 

 margin narrowly, ochreous ; Membrane mostly wanting ; according 

 to Fieber, blackish with a lighter spot at the base. Sternum 

 ochreous-brown; sides of the prosternum broadly ochreous. Legs 

 ochreous. 



Abdomen above ; posterior angles of each segment with a large, sub- 

 triangular spot, and the spines, ochreous ; underside ochreous-brown. 

 Genital segments above and beneath, posterior margin ochreous. 



Length, 4^ 5 lines. 



Eare. "We are indebted to Professor Westwood for the loan of a 

 specimen, and also for the following notes of captures. " Two speci- 

 mens both alike (and like mine, with rudimentary hemielytra) taken 

 by Mr. Johnson, No. 44, Eea Street, Birmingham, about 30 years 

 ago, in a well in Sutton Park, Warwickshire, which, from the smell 

 and the taste, is or was known to the collectors of Birmingham by 

 the name of 'the Brimstone Well.' He thinks it is now (20 

 years ago) filled up. He informs me that he saw numbers of 

 specimens (perhaps 20) swimming and diving (like Corixa), and not 

 running on the bank (like Salda), and that he was obliged, in order 

 to secure them, to dip the end of his fly-net into the water, having 

 no landing-net with him." 



" Mr. P. W. Hope, in damp situations, near water, in Bagley 

 Wood, Oxon." 



