No. 22.] HYMENOPTERA OF CONNECTICUT. 589 



L. curvispinosus Mayfj subspecies ambiguus Emery. 



Very similar to the preceding but with shorter and straighter 

 epinotal spines. 



West Haven (H. L. V.) ; Stafford (W. E. B.) ; Col^brook 

 (W. M. W.). 



Tetramorium Mayr. 

 °T. caespitum Linnaeus. 



Though this form has not yet been recorded from Connecticut, 

 there can be little doubt that it occurs within the state. I have 

 fbund it at Mamaroneck and Cold Spring Harbor, N. Y., both 

 localities very near the Connecticut boundary. It has been in- 

 troduced into America from Europe. 



DOLICHODERIN^. 

 Key to Genera. 



1. Chitinous integument hard and brittle, often strongly sculp- 



tured; thorax and petiole often spinose or angular 



Dolichodenis p. 589 

 Chitinous integument thin and flexible, smooth or very finely 

 sculptured; thorax and petiole always unarmed 2 



2. Scale of petiole very small, strongly inclined forward, or 



even altogether absent 3 



Scale of petiole more or less inclined, but well developed .... 4 



3. Scale of petiole small but distinct; gizzard with a convex, 4- 



lobed calyx Forelius 



Scale vestigial or absent; gizzard with a depressed calyx, 

 without lobes Tapinoma p. 590 



4. Epinotum with a conical elevation Dorymyrmex 



Epinotum without a conical elevation 5 



5. Body not conspicuously hairy or pubescent; gizzard very 



short with a large reflected calyx; ocelli absent . .Iridomyrmex 

 Body densely pubescent; gizzard at least as long as broad; 

 ocelli usually present in large workers Liometopum 



Dolichoderus Lund. 



D. mariae Forel. 



Readily distinguished from our other species of Dolichoderus 

 by the bright red head and thorax in the worker and female. It 

 forms large colonies, nesting in sandy places about the roots of 

 glasses and bushes. The workers ascend trees in files and attend 

 aphids and coccids. 



Connecticut (Emery). 



