PHYLLOPHAGA — TENTHREDINID^. 1 7 



Semlivenfrls in allusion to the form of the abdoiiien, and Securifera 

 or Serrifera after the form of the ovipositor)," into four " families" : 



Metathorax (fourth body segment) fissured in the middle at its apex, antenna> 



placed above the clypeus, and above the lower part of the eyes; anterior 



wings with at least three cubital cells. 



Anterior tibife with two spines at the apex ; prothorax small. .Tentiiredinid.k. 



Anterior tibi* with one spine at the ajiex ; protliorax large. 



Antennae subclavate ; abdomen compressed ; middle lobe of mesothorax not 



reaching to the scutellum ; tibife spined ; ovipositor short Cepiiid.e. 



Antenuje of uniform thickness; middle lobe of mesothorax reaching to the 

 scutellum and separated from it by a transverse line ; ovipositor long. 



.SiRICID.E. 



Metathorax not fissured ; antenna; inserted below the clypeus and the eyes ; an- 

 terior wings with two cubital cells; ovipositor semi-spiral.. ..Oryssid.e. 



The first "fiimily," Ten/A ref///*/(^/«', is then taken up and divided 

 into the following "tribes (or subfamilies) :" 



Prothorax eniarginate behind; middle lobe of mesothorax much longer than 

 broad, not separated from scutellum by a deep fovea; basal nervure not 



received in first cubital cell. Larvae with ventral legs 2. 



Prothorax .subtruncate behind ; middle lobe of mesothorax not much longer than 

 broad, and separated from scutellum 1)y a deep fovea; basal nervure 

 received in first cubital cell; tibia» si)iiied. Larvie without ventral 



legs i). 



2. — Anterior lobes of metathorax well developed, so that the cenchri are sepa- 

 rated from the scutellum by a comparatively wide space. 'i. 



Anterior lobes of metathorax not well developed, cenchri almost touching 



the scutellum 4. 



3. — Anterior wings with two radial cells; second and third cubital cells receiv- 

 ing each a recurrent nervure; lanceolate cell rarely petiolate; anteniiiie 

 usually 9-jointed, rarely 7-15 jointed. Larvae with twenty-two legs. 



Tenthredina. 



Anterior wings with one, rarely with two radial cells ; second (or first when 



there are only three) cubital cell receiving both recurrent nervures; 



lanceolate cell petiolate, rarely constricted ; antennse 9-jointed. Larvte 



with twenty legs Nematina. 



4. — Antennae clavate ; sidcH of abdomen acute. Larvie with twenty-two legs, 



ejecting an acid liquid from lateral pores Cimbicina. 



Antennae 3-jointed; anterior wings with one radial cell, usually ajipcndicu- 

 late ; tibiae s])ined. Larvre with eighteen or twenty !egs..Hylotomina. 

 (Antennae 4-joiuted, the third joint the largest ; basal nervure received in the 



first cubital cell; ovipositor exserted Blasticotomina.) 



\ VntenniU multiarticulate, sei-rate in J . flabellate in % . Larva- with twenty- 

 two legs Lophyrina. 



5. — Antennse setaceous, multiarticulate; abdomen depressed ; ovipositor not ex- 

 serted Lydina. 



Antennae 12-jointed, the third very much larger than any of the otiurs: 

 ovipositor exserted Pinicolina. (^Xyeliiiin.) 



TR.VNS. .VMER. ENT. SOC. (3) SUI'I'I.. VOI,. 1887. 



