150 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



This insect will be readily recognized by its resemblance in 

 miniature to a mole. It is found in the mud or sand along the 

 margins of streams and ponds. Here it makes small burrows 

 resembling those of a mole, about the size of a lead pencil. Not 

 common. New Haven (shore of Lake Whitney), 4 August, 

 Bloomfield, 18 October (W. E. B.). 



Tridactylus Oliver. 

 Head and pronotum rounded ; eyes oval ; antennae short. The 

 fore tibiae not broadly expanded as in Gryllotalpa, but furnished 

 with four apical spines or teeth. These teeth vary much in size 

 and form. The tegmina are horny and opaque, not reaching the 

 tip of the abdomen, and the males are not furnished with a calling 

 organ. The hind wings are long and folded lengthwise like a 

 fan. The posterior femora are long and broad, and, unlike the 

 large mole-crickets, the members of this genus are active leapers. 

 The species of this genus are " sand crickets," and are among the 

 smallest crickets. The largest of the three species found in the 

 United States is less than 10 mm. (about ^ of an inch) in length. 



T. terminalis Uhler. Plate XI, 5. 



General color glossy black, more or less marked with reddish 

 brown spots. Posterior femora with two white spots or fasciae. 

 The wings reach to the tip of the abdomen or somewhat surpass 

 it in both sexes. 



Measurements. 

 Body Pronotum Tegmina Hind Femora 



6-8 2 3 3-5 



This insect makes very small burrows in the sandy margins 

 of ponds. We have not taken the sand cricket in this state, but 

 Scudder states that it has been taken in Connecticut. 



GRYLLIN^. 



This sub-family includes the ground and field crickets which 

 are everywhere so common during the summer and fall. 



Key to Genera. 



Last joint of maxillary palpi twice the length' of the one 

 preceding ; hind tibiae with long, movable, pilose spines ; 



