676 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



N. burmeisteri Lethierry and Severin. (Fig. 154.) 



Cat. Hem. iii, 51, 1896. pusillus Burme 



tllen). 



New Haven, 25 March, 191 1 (A. B. C.) 



Cat. Hem. iii, 51, 1896. pusillus Burmeister, Handb. ii, 214, 1835 (not 

 Fallen). 



Fig. 154. Naeogeus burmeisteri Lethierry and Severin, — dorsal view, 

 enlarged about fifteen times. Drawing by Dr. Philip Garman. 



Merragata White. 



(Lipogomphus Berg.) 



This curious genus may at once be separated from Naeogeus 

 by the antennal structure. 



Key to Species. 



(Adapted from Drake.) 



1. Head with two grooves converging anteriorly, separated by a 



median ridge 2 



Head with one median longitudinal groove hebroides 



2. Pronotum moderately constricted at sides ; disk with a broad and 



deep longitudinal furrow foveata 



Pronotum more abruptly constricted, discal groove shallower . .brunnea 



M. brunnea Drake. 



Ohio Jour. Sci., xvii, 103, 105, 1917. 



This little species has been taken in New York on duckweed, in 

 company with Microvelia borealis, which it somewhat resembles. 

 It is, however, widespread throughout the United States and I 

 have it from Illinois. Doubtless it will sometime be found in 

 Connecticut. Nothing is known of its life history. 

 M. foveata Drake. 



Ohio Jour. Sci., xvii, 103, 1917. 



This species is described from Ohio, and seems to be more west- 

 ern than the other. It may be found in Connecticut, however, as 

 so many forms supposedly foreign to us have been turned up in 

 the East. 



While M. hebroides White is mentioned in the key, it is only so 

 that either of the other species may not again be mistaken for it. 

 All my own records from the United States were based on brunnea 

 Drake, and must be corrected to agree with the preceding. 



