26 MONOGRAPHIA CIIALCIDUM= 



rufi : maris femora postica nigro-fusco cingulata, antica basi fiisca. 

 (Alarum longitude, 2 lin.) 



Body broad, gibbous : head large : wings rather sliort. 

 July ; on windows ; Southgate. 



Genus IV. Decatoma, Spinola. 



Caput medium: palpi maxillares 3-articulati : maris antennae 11- 

 articulatae, pilosse, subclavatae : femince antennae 1 2-articulata2, 

 pilosae, clavatae : thorax gibboso-cylindricus : abdomen com- 

 pressum. 



* Stigma suhlunaris. 



Sp. 1. Dec. Cooperi. Cvrt'is. Mas et fem. Nigra, jmbescens, 

 jlavo variegata. — British Entomology, Plate 345. 



Caput punctatum, antice flavum : oculi ocellique rufi : thorax 

 punctatus, obscurus, antice flavo marginatus : abdomen nitidum, 

 glabrum : antennae basi apiceque flavae : pedes flavi : tibiae pos • 

 ticae femoraque 4 posticae nigro maculatae : alae hyalinae : stigma 

 sublunaris, fusca, costam versus nigra. (Alarum longitudo, 

 2| lin.) 

 Found on the hazel-tree, in September, by A. Cooper, Esq. 



Sp. 2.' Dec. biguttata. Mas et fem. Nigra, abdomine biina- 

 culato, Jlavo variegata. 



Chalcis biguttata. Stved. 



Maris oculi ocellique rufi : prothorax utrinque flavo maculatus : 

 abdomen basi fuscum : antennae fuscse, scapo obscuriore : femora 

 basi, genua tarsique flavi : tibiae anticae fuscae, subtus flavas : alae 

 hyalinae : stigma sublunaris, fiisca, costam versus nigra : femime 

 caput flavo variegatum : prothorax flavus, maculis 3 nigris : meso- 

 thoracis lineae duas, obliquae : alae basi, abdomen basi, maculaeque 

 duae laterales sublunatae, flavae : antennarum articulus 2 apice 

 clavaque flavi : pedes flavi : femora tibiaeque nigro vel fusco 

 maculatae. (Alarum longitudo, 1| — 2 lin.) 



A yellow line extends along the suture, between the scutum 

 and the parapsides of the mesothorax : there is a yellow line 

 also between the mesoscutellum and the metathorax. 



June ; amongst grass beneath oak trees ; Southgate. 



Sp. 3. Dec. obscura. Fem. Nigra, Jlavo variegata, femora 

 tibiceque anticte Jnsco macidatce. 



