ECHTHEOGALEUS COLEOPTRATUS. 89 



1. Echthrogaleus coleoptratus (Gruerin). 

 (Plate XXII, fig. 4.) 



1829-1843. D Inemat ura coleoptrata G-uerin. (55) pi. xxxv, fig. 6. (1840). 



1835. Pandarus alatvs ("M. Edwards") Johnston. (66) p. 202, two 

 text-figs. 



1850. Dinemoura alata Baird. (4) p. 285, pi. xxxiii, figs. 8, 9. 



1861. Echthrogaleus coleoptratus Stp. & Ltk. (127) p. 380, pi. viii, 

 fig. 15. 



1900. Echthrogaleus coleoptratus T. Scott. (112) p. 156, pi. vi, fig. 52. 



1907. Echthrogaleus coleoptratus C. B. Wilson. (148) p. 367, pi. xix. 



1910. Echthrogaleus coleoptratus T. R. R. Stebbing. (125) p. 559. 



Female. — Body oblong, fully twice as long as broad. 

 Carapace suborbicular and equal to about a third of 

 the entire length of the animal ; frontal plates toler- 

 ably large and distinct. First two thoracic segments 

 short and narrower than the carapace ; dorsal expan- 

 sion not greatly developed. Dorsal plates of the third 

 segment much enlarged, wider behind than in front, 

 and covering rather less than half the genital segment, 

 their posterior margins obliquely and sinuately trun- 

 cated so that the inner corners extend further back- 

 ward than the outer, and though the inner margins of 

 the plates come close together in the middle line they 

 do not overlap, their margins being even, not serrated, 

 and their surface smooth and ornamented with a 

 number of small pellucid impressed circular markings 

 arranged in a more or less regular pattern, which, 

 along with the form of the plates, gives them a fairly 

 close resemblance to the elytra of certain coleopterous 

 insects. Genital segment tolerably large, extending 

 backwards considerably beyond the dorsal plates 

 described above, becoming somewhat narrower pos- 

 teriorly and being divided into two lobes by a narrow 

 and deep median cleft or sinus ; the inner edges of 

 the lobes closely appressed and not overlapping, and 

 their posterior margins rounded and reaching to about 

 the end of the caudal rami ; the abdomen, which is 

 concealed in dorsal view by the genital segment, com- 

 paratively small and sub-quadriform in outline, the 

 width being somewhat greater than the length ; caudal 



