^.v**^ n 



Fig. 14:32. Tendipedinae. a-h, Co/opsecfra dives (Joh.). Larva: 

 a, head; b, caudal segments; d, mandible; e, labial plate and 

 paralabials. Pupa: c, comb of eighth segment; f, second to sixth 

 tergites; g, respiratory organ; h, eighth and ninth segments 

 i-/,o,p, Pseudochironomus richardsoni Mall. Larva: I, antenna; 

 /', labial plate and paralabials; k, mandible; o, caudal segments. 

 Pupa: /, respiratory organ; p, caudal segments. m,r, Stenochirono- 

 mus, larva: m, antenna; r, labial plate. n, q,i,f, Tanyfarsus 

 (Stictochironainus), larva: n, antenna; s, labial plat*; t, mandible; 

 q, lateral fin of eighth segment of pupa (Johannsen, 1937). 



genera in having the four middle teeth of the labial 

 plate pale (fig. 14:33i); the pupae have about twelve 

 branches in the prothoracic respiratory organ (fig. 

 14:33A), one of which is much larger than the others. 

 One California species: 



albimanus (Meigen) 1818. 



Plumas, Placer counties 



Genus Polypedilum Kieffer 



(Figs. 14:20i; 14:21/,^; U:21a-d) 



Larvae of this genus differ from others of the "Chiro- 

 nomariae connectentes" in having five-segmented 

 antennae (fig. 14:31a) as in the Tendipes group, but 

 the labial plate has an even number of teeth (16), 

 usually with the middle pair the longest (fig. 14:316); 

 the ring organ of the antenna situated at the proximal 



421 

 Wirth and Stone: Diptero 



fifth. The widely separated paralabial plates and the 

 anal gills constricted near (he middle un> also 

 tinctive of the larva. The pupae have prothoracic 

 respiratory organs with four to <>i^lit branches, and 

 the cephalic tubercles may be wartlike, each apically 

 with an area of minute pointed papillae (subgenilE 

 Pentapedilum), or low and conical without apical 

 bristles (Polypedilum). The wings are usually dis- 

 tinctly maculate (fig. 14:2Ch). Adults of the subgenus 

 Pentapedilum resemble those of Calopsectra in having 

 hairy wings. 



The habits of this large and widespread genus, 

 although incompletely known, are diverse; of partic- 

 ular interest are the species which, mine the leaves 

 and stems of aquatic plants. Here again the species 

 of the subgenus Pentapedilum seem to use thoir 

 burrows for the purpose of supporting the salivary not 

 on which they collect their plankton food, whereas 

 species of the subgenus Polypedilum actually feed 

 on the leaf tissue (Berg, 1950; Walshe, 1951). 



California species: 



aviceps Townes 1945. 

 digitifer Townes 1945. 

 isocerus Townes 1945. 

 laetum (Meigen) 1818. 

 pedatum excelsius Townes 1945. 

 scalaenum (Schrank) 1803. 

 [= needhami (Johannsen)J 



Santa Clara County 



Kern County 



Placer, Mono 



Placer County 



Plumas, Del Norte 



Laguna Canyon 



Genus Stenochironomus Kieffer 



In this genus the larvae have six-segmented antennae 

 (fig. 14:32m), sixteen dark teeth in the labial plate, 

 the middle pair projecting beyond the others, and the 

 paralabials are' well developed but the striations are 

 very weak (fig. 14:3277i). The pupae have four branches 

 on the prothoracic respiratory organs. The wings are 



Fig. 14:33. Tendipedinae. a,f-i, Paratendipes albimanus (Mg.). 

 Larva: a, antenna; i, labial plate. Pupa: f, cephalic tubercles; 

 q, comb of eighth segment; h, respiratory organ, b-e,/, Micro- 

 tendipes pedellus (DeGeer). Pupa: b, tip of branch of respiratory 

 organ; d, cephalic tubercle; e, comb of eighth segment. Larva: 

 c, labial plate; /', ontenna (Johannsen, 1937). 



