387] LARVAE OF THE TENTHREDINOIDEA—YUASA 69 



character the larvae of this genus resemble those of certain species of 

 Pontania. The modifications of the body are undoubtedly correlated with 

 the boring habit of the larvae. MacGillivray still considers this genus 

 as without question belonging to the Cladiinae, but Rohwer regards it as 

 belonging to his tribe Hemichroini. It is dealt with here under the Hop- 

 locampinae because the larvae more closely resemble larvae of this sub- 

 family than they do those of the Cladiinae. 



Caulocampus acericaulis MacGillivray. — Length, 8 mm.; width of head, 

 .8 mm.; head light brown, body straw-yellow; resembles larvae of weevils 

 in general appearance; mouth-parts normal in form; in young specimens 

 head yellowish and body whitish; annulation, 2, 1, 3, 4; maxillary palpi, 

 3, 2, 1, 4, segments brown, slender; galea digit-like, very small; thoracic 

 legs with very small tibiae, tibia subequal in length to maxillary palpus; 

 tenth abdominal tergum with many minute setae evenly and promiscu- 

 ously scattered, not concentrated on subanal lobe; larvae bore into the 

 petioles of maple-leaves; Y (generosity of Dr. W. E. Britton, New Haven, 

 Conn.). 



Subfamily Dineurinae 



Larvae small; body subcylindrical, flattened on venter or cylindrical, 

 usually tapering toward the caudal end, greenish or yellowish, often with 

 dorsum darker, never with bright-colored markings; glabrous or setiferous; 

 head small, light greenish or yellowish, never with distinct markings; 

 ocellarae blackish; mouth-parts usually brownish; thorax wider than the 

 remainder of body, thoracic legs well-developed, caudal pairs larger than 

 the cephalic, directed laterad; segmentation distinct; annulation indistinct; 

 larvapods on abdominal segments 2-7 and 10, sometimes rudimentary; 

 intersegmental coria often distinct and whitish; larvae feed on under side 

 or upper side of leaves, eating the parenchymatous layers only or feeding 

 on edges of leaves or mining in the leaves; ultimate stage glabrous and 

 yellowish; pupation in single-layered parchment-like cocoons in the 

 ground; some species with nauseating odor. 



The Dineurinae as limited by MacGillivray contains three genera, 

 Dineura, Mesoneura, and Pseudodineura, and includes not over twenty- 

 five species, which are mostly distributed in Europe and North America. 

 This subfamily resembles in wing-type the Hoplocampinae. Systematists 

 do not agree in the exact position of the small European genus Pseudo- 

 dineura. Konow would place Dineura in his tribe Nematides but both 

 Mesoneura and Pseudodineura in his tribe Blennocampides. Rohwer, 

 on the other hand, would associate Dineura and Mesoneura in his tribe 

 Nematini, and is not quite certain whether Pseudodineura also belongs 

 to this tribe or not. Cameron, who described the larva of Pseudodineura 

 parvulus under the name of Dineura despecta, altho aware of the differences 



