78 ^ . [April, 



" I can confirm all you have said about the early state of the larva, but none 

 the less it is a fact that in its more mature state it feeds on the partial leaf-stalks 

 and leaves, as described in Newman. Saunders called it the ' Trade-Mark,' and we 

 used to look for the bitten leaf-stalks and dangling leaves as the readiest guide to 

 the larvEe. 



" I cannot call to mind a single instance in which I have found the mature larva 

 in any considerable quantity on a plant which was not thus bitten, and I have 

 collected, and seen collectpd, many hundreds. This last season I noticed the larva 

 of another species feeding on the seeds of Thalictrum flavurn, so we must not credit 

 C. sagittata with all the gnawed seeds. 



" I have noticed that when tlie matui'e larvae feed on or inhabit the leaves and 

 stems, they are more brightly coloured than when confined to the panicles. In 

 conclusion, I must remind you that the ' bitten ' state of the plant with dangling 

 leaflets all over it betrayed, in the first instance, the existence of a larva, and led to 

 the discovery of the lai'va of this species hei'etofore unknown. — A. F." 



A NEW MARINE SYBROMETRID. 



BY GEORGE H. CARPENTER, B.Sc, P.E.S. 



Through the kindness of my friend Mr. J. E. Duerden, Curator 

 of the Museum of the Institute of Jamaica at Kingston, I have re- 

 ceived for examination adult and larval specimens of a new and highly 

 interesting marine bug belonging to the family Hydrometridce, and 

 allied to Halohates. The insects were collected by Mr. Duerden in 

 January, 1897, skimming over the surface of smooth vvrater beneath 

 mangrove trees, near the head of Kingston Harbour, Jamaica. They 

 resemble Halohates in the absence of wings, and in general appear- 

 ance ; but the abdomen is of more normal development than in the 

 oceanic genus, while there is no fringe of hairs to the tibial and tarsal 

 segments of the second pair of legs. Instead of this, the tarsi of the 

 second pair are provided with an exquisite arrangement of long 

 branched ciliated hairs, which can be spread out like the spokes of a 

 wheel, and thus afford two disc-like areas of support to the insect as 

 it rests on the surface film. 



TEOCHOPUS,* gen. nov. 

 Antennae two-thirds as long as the body ; first segment the longest, but only 

 half as long as the other three together ; third segment longer than the second, and 

 second slightly longer than the fourth. Body rhomboidal in form, broadest at region 

 of middle coxae ; wingless ; abdomen with reflexed margins, longer than head and 

 thorax together. Femora of equal thickness in all three pairs of legs ; coxae of 

 second pair inserted at middle of body, femora reaching just beyond tip of abdomen ; 

 femora of third pair barely reaching tip of abdomen. All tarsi with two segments, 



* Trochos, a wheel ; Pous, a foot. 



