DASCYLLIDAE. 171 



Tliroiigli Brachypscctra a rclationsliip is shown between the 

 Dascyllini and the Eubriiui of iho next sub-family. 



Sub-Family II.— HELODIN.E. 



This sub-family contains a number of small species found on 

 plants in moist situations, and readily recojjnized by the anterior 

 and middle coxae having no trochantin. Thc}^ are divided into 

 six tribes : — 



Tarsi with tlie fourth joint very small, third lobed beneath. 



Ptilodactylini. 

 Tarsi with the fourth joint as large or larger than the third. 



Posterior coxae very large. Eucinetini. 



Posterior coxae at most moderately dilated internally. 

 Claws without membranous appendage. 



Front moderately broad, prosternum very short before and very 

 narrow between the coxqp. Hki.odim. 



Front narrowed by the insertion of the antennae, prosternum dis- 

 tinct before and between the coxae. EfBRUKi. 

 Claws with membranous appendage arising from the base of each claw 

 and as long as it. 

 Front narrowed by the insertion of the antenna?. Placoxychini. 



In the above table the Ptilodactylini seem to lead very natu- 

 rally from A))chytorsu)i of the preceding sub-family, resembling 

 also in many points the tribe Chelonariini of the Byrrhidse. The 

 Euhriini and Placonychini have more than a resemblance to the 

 Parnidse, the anomalous Pi<ephenus of that family affording a 

 close link with the present. The last tribe by its appendicnlate 

 claws approaches in another direction the Melyridaj, but the 

 afiinilies otherwise are not well marked. 



Tribe I.— PTIl.OI>ACTYLI\I. 



Represented in the Atlantic district by two species of Ptilo- 

 dactyla; they are oval, brown, finely pubescent insects of convex 

 form ; the antennse of the males have arising from the base of the 

 joints 4-10 a slender cylindrical articulated appendage, equal in 

 length to the joint itself; the clypeal suture is very distinct, and 

 the front rises slightly above the epistoma; the labial palpi are 

 normal in form. The prosternum is quite distinct before the 

 coxffi, but not visible between them. The middle coxse are not 

 covered by the front coxaj, which are conical and prominent, and 



