NOTES ON CEYLONESE TETRIGfflSLE. 
143 
small stream trickles down over the face of a rock and makes a small 
waterfall. Here S. gavialis was common in all stages on the damp 
rocks, taking wing fairly readily. I had always looked on this 
species as a representative of the montane region, but Labugama 
is at an elevation of only about 150 feet.” Ninety-one specimens 
in all were taken by Mr. Fletcher in the following localities : 
Madulsima, Haputale, Labugama, and Maskeliya. It has pre¬ 
viously been reported from Dambulla, Peradeniya, Pundaluoya, 
and Kandy. 
Scelimena logani , Hancock. 
Spolia Zeylanica, vol. II., pp. 120-122, Plate I., figs. 5-5c, 1904. 
Like the preceding, this species is also aquatic, often diving in the 
water, and living on rocks in streams. But one example was taken 
at Madulsima, May 16, 1908, by Mr. Fletcher, who says : “In the 
evening I went over to Roeberry estate, worked a little way down 
the bed of the stream there, and took a few specimens of Scelimena 
gavialis , and among them two examples which appear to be logani . 
Nothing special was noticed about the habits of these latter.” I 
find only one specimen of logani in the collection forwarded to me 
bearing this date on the label. This species has previously been 
recorded from Kandy, Haragama, and Kalawewa. S. logani is 
easily distinguished from gavialis by the presence of an additional 
small tubercle situated on each side of the lateral lobes before the 
spines, by the several distinct spines arming the lower border of the 
posterior femora, and also by the yellowish colour of spines and thin 
edging of the same colour on the pronotum. In gavialis this colouring 
is replaced usually by vermilion red, instead of yellowish, as in 
logani. 
Gavialidium crocodilus, Saussure. 
Ann. Soc. Entom., France, p. 485, 1860. Figured by Hancock in 
Spolia Zeylanica , vol. II., Plate II., figs. 4-4c, 1904. 
This is a singular species, having more sluggish habits than 
Scelimena , and often living on grayish coloured rocks. It is not 
aquatic, though sometimes individuals associate in small groups 
not far from the water. The hind tibiae are not modified in the 
form of paddles in this species. At Madulsima, May 16, 1908, Mr. 
Fletcher found two examples along a small hillside stream ; both 
were on dusty gray rocks, not immediately near the water, and they 
were very difficult to distinguish. In the previous notes under 
Scelimena gavialis is mentioned the eminently procryptic coloration 
of both S. gavialis and G. crocodilus , which need not be repeated in 
detail here. On May 20, along the lower road at the waterfall, a 
few specimens were taken in all stages. Again on the 26th the rocky 
bed of a small stream yielded a few, mostly immature, individuals. 
Later on in the season, at Madulsima, August 12, it is mentioned as 
