1915] 
Muttkowski: New Insect Life Histories 
117 
THE LARVA 
Length of full grown larva, 10-llmm.; width 1.3- 1.8 in widest portions. 
Color cream-yellow, the segments each centrally and indefinitely with 
a touch of ochre yellow. Head a deep golden brown, posteriorly narrowly 
rimmed with black; the posterior claws black. 
General form sub-cylindrical in the first half, tapering posteriorly to 
the tip of the abdominal feet, the two apical segments barely one-half as 
Fig. 2 Diamesa mendotae n. sp. Larva. 
wide as the thoracic and first abdominal segments. There are sharp 
constrictions at the joints and since each segment is plump and therefore 
presents a convex outline, the comparison of the larva to a string of beads 
constantly decreasing in size is not at all out of place. In general, there- 
fore, the larva may be said not to have the evenly cylindrical outline of 
the typical Tendiped (Chironomid) larvae. 
The head is placed slightly oblique, very small, more so than in typical 
Tendipeds. Eyes single (i. e., only one group present each side), axially 
elongate. Mandibles, palpi and other mo.tfth-parts tipped with black. 
Antennae four-jointed, the basal joint longer than all others together, 
cylindrical; from the tip of the first joint arise a three-jointed process and 
a spine which is as long as the first two joints of the process. Mandibles 
