GAVIALIDIUM. 



29 



18. Gavialidium crocodilus, Saiiss. 



Scelpiiena crocodilus, Saussure, Anu. Soc, Ent. France, (4) i, 1861, 



p. 481. 

 Gavialidium crocodilus, Bolivar, Anu. Soc. Ent, Belo-. xxxi, 1887, 



pp. 218, 219; Hancock, Spol. Zevl. ii, 1904, pp. 107, 122, 123, 



pi. ii, fig. 1 ; id., Gen. Ins., Ortli. Tetrig-. 1900, p. 25, pi. ii, 



fig. 16. 



Greyish brown, thickly reticulate-rugose, the dorsal carina 

 soinetimes more or less yellow, the legs sometimes spotted or 

 interruptedly lined with yellow, and the tip of the pronotum 

 reddish. Pronotum with three parallel 

 cariuse on the front, the middle one con- 

 tinued to the extremity, which is obtusely 

 truncated ; the lateral cariupe are finely 

 denticulated in front, and there is a larger 

 tooth on each side at their greatest ex- 

 pansion ; the lower lateral border of the 

 pronotum has a projecting tooth at the 

 front angle, behind which it is more or 

 less strongly denticulated as far as the 

 lateral lobe, which is armed with three 

 teeth. Front and middle femora armed 

 with two or three rather strong teeth 

 above and below ; hind femora much less 

 distinctly so ; hind tibife very slightly ex- 

 panded towards the extremity. Tegmina 

 lanceolate ; v^'iugs shorter than the pro- 

 notum, with violet iridescence ; costa 

 opaque. 



Length, to end of pronotum, 19-25 mm. ; 

 to end of abdomen, 15 inm. ; breadth 

 of pronotum from spine to spine, 7 mm. ; length of hind femora, 

 7-8 mm, 



Cetlon : Kaduganawa, Pundaluoya. 

 Type in the Geneva Museum. 



Found in March, April, and June. Taken " from rocks over 

 which oozy water trickles; insect seldom actually wet; very 

 sluggish ; seldom takes wing" (jE". E. Green, quoted by Hancock). 



19. Gavialidium alligator, Sauss. 



Scehjmena (dliffutor, Saussure, Ann. Soc. Ent. France, (4) i, 1861, 



p. 483. 

 Gavialidium alligator, Bolivar, Ann. Soc. Ent. Belg. xxxi, 1887, 



pp. 218, 219 ; Hancock, Spol. Zeyl. ii, 1904, pp. 107, 122, 125. 



Very similar to G. crocodilus, but smaller, and the pronotum 

 shorter. The middle carina is strongly undulated and lohate on 

 its first half ; the short front carinse are strongly raised, but 

 hardly crenulated ; the humeral angles are spinose, and the 

 lateral margins of the pronotum are well marked, but not denti- 

 culated ; the lateral projections terminate in three equal lobes, 



Fig. 28. — Gavialidiu'M 

 crocoddus. 



