OF WASHINGTON, VOLUME XV, 1913. 37 



The genus Telegeusis described by Horn 1 , as belonging in the 

 Drilidse, shows some points of similarity, but the differences in 

 venation, and genital organs are too fundamental, it appears, to 

 allow their close association in the classification. Closer compari- 

 sons should, however, be made of Telegeusis and Atractocerus 

 to determine the assignment of the former to the Lymexylonidse 2 



The importance of these observations was recognized so late in 

 the season that the writer failed to collect sufficient material to 

 permit the dissection of the reproductive form, and on account 

 of ill luck and difficulty in the breeding, many of the larvae kept 

 under observation have died. Lest some unforseen changes make 

 it impossible to carry on further observations during the coming 

 season, it is thought best to make the data so far secured avail- 

 able to those who may be better prepared to work out the com- 

 plete life cycle and to make the important histological studies. 



EXPLANATION OF PLATES 

 PLATE 2. REPRODUCED FROM HUBBARD* 



Fig. 1. Micromalthus debilis Lee., larva enlarged twelve times. 



Fig. 2. Head and thoracic segments, lateral view; much enlarged. 



Fig. 3. Terminal segments showing the anal appendages, lateral view. 



Fig. 4. Head from above, very much enlarged. 



Fig. 5. Head from below, with mandibles omitted. 



Fig. 6. Right maxilla, seen from below. 



Fig. 7. Right antenna seen from below. 



Fig. 8. Anal appendages, seen from below, very much enlarged. 



Fig. 9. Corneous triangular piece lying above the mentum, with the left 

 mandible thrown back, seen from above; the ridges upon the under surface 

 of the mandible are indicated by dotted lines. 



Fig. 10. Imago. 



NOTE: For the sake of distinctness, the appendages in fig. 3 are drawn 

 too large in proportion to the segments. The proportions are more cor- 

 rectly given in figures 1 and 8. 



PLATE 3. 



Figs. 1, la. Dorsal and lateral photos of reproductive form after it had 

 given birth to seven young. Length about 3 mm. Thoracic segments con- 



1 Proc. Cal. Acad. Sci., vol. v, 1895, p. 242, plate xx. 



2 Since the above was written a specimen of Telegeusis was sent to Mr. 

 F. Muir of Honolulu, who has kindly examined its genitalia and reports 

 it to be a typical Lymexylonid approaching nearest to Atractocerus afri- 

 canus. 



5 Proc. Amer. Philos. So., 1878, vol. xvn, p. xv. 



