OCCURRING ABOUT HOLYWOOD. 



161 



This little insect is to be found on grass throughout the 



summer ; but is difficult to capture, flying off as soon as it is in 



the net. 



L. irrorata. Nigra, niiida, thorace olivaceo-jjruinoso, linea 

 dorsall albomicante, alls fuscis, alio guttatis et tesselatis^^ 

 nervuris undulatis, pedibus testaceis. 



Tachydromia irrorata. Fall. Empid. 13, 17.? 



Size of the last, inhabiting the same situations, but more common : 

 the thorax is opaque, with more evident white markings : wings 

 dark ferruginous, the base yellowish, the intervals between the 

 1st, 2d, and 3d nervures, and the oblique one of the tip, are 

 chequered with large white spots : the rest of the wings, except 

 the portion of the disk between the 3d and 4th, more faintly 

 marked with small irregular dots. 



L. exoleta. Nigra, niiida, alis cinereis. 



This may be a variety of L. irrorata, as the wings in some lights 

 appear very faintly spotted : the nervures are not undulate : the 

 thorax is opaque black, without apparent markings (probably 

 discoloured) : a single male with the others. 



Tachypeza umbrarum. Nigra, nitida, antennis pallidis, alis 

 fasciis 2 fuscis, aniice suhconnexis. 



The bands of the wings are connected by a very narrow line along 

 the costa : the joints of the legs are pale, the middle shanks end 

 in a produced sharp tooth. 



T. arenaria. Nigro-fusca, opaca, alis abhreviatis, fuscis^ 

 pedibus brevibus, rufo piceis. 



A singular insect, not arranging well either with this genus or with 

 Drapetes : the body is coriaceous and opaque, the wings not longer 

 than the abdomen, but with distinct nervures, nearly as in Dra- 

 petes : the costa thick ; they are useless for flight : abdomen of 8 

 segments : feet very short for this family, coriaceous, unarmed, 

 fore thighs thick, ovate, fore shanks clavate : proboscis thick, 

 conical, inflected to the breast : antennae with the second joint 

 compressed, orbicular, much larger than the third : seta 2-jointed 

 pubescent. 

 Inhabits sandy coasts under marine rejectamenta, running 



with extraordinary swiftness. Taken at Midsummer; did not 



occur late in autumn. 



T. graminum. 

 This is probably congenerous with the last, which it resembles in the 



NO. II. VOL. I. Y 



