EMBIOPTE'RA OF THE NEW WOIRL.D ROSS 415 



though possessing typical embioid wing venation (i. e., R4+5 forked in 

 both wings), has abdominal terminalia apparently very similar to 

 alMstriolatus (as near as can be judged by reference to Enderlein's 

 incomplete figure (1912, fig. 11)). The peculiar wing venation of 

 Enderlein's specimen mtiy prove to be anomalous, and thus the genus 

 should be defined on the basis of structure of terminalia. The genus 

 appears to be allied to Embolyntha but apparently can be separated 

 from it by the weakly developed, fleshy right hemitergite. 



It is noteworthy that the two included species occur in the same 

 region, i. e., along adjacent upper tributaries of the Amazon Eiver. G. 

 albistriolatus apparently can be distinguished from C. gurneyi by the 

 white cross veins of the wings and the basal tooth on the outer margin 

 of the left tergal process (10 LP) . 



CALAMOCLOSTES ALBISTRIOLATUS Endeilein 



CalamocJostes albistriolatus Enderlein, 1909, p. 189.^Kraitss, 1911, p. 73. — 

 Enderlein, 1912, p. 28, figs. 10-11, pi. 3, fig. M.— Navas, 1918, p. 94.— Davis, 

 1940a, p. 189, figs. 82-83 (after Enderlein). 



Uolotype. — Male, in Stettiner Zoologischen Museum. 



Type data. — "Ecuador. Bonos am Ostabhange der Ostkette der 

 Cordilliere, 1800 m. hoch. 31, Marz 1899. 1 5 , gesammelt von E. 

 Schmidt (coll. Haensch)." 



CALAMOCLOSTES GURNEYI, new species 

 Figures 17-19 



Male. — Color (on slide) very uniform dark chocolate brown 

 throughout, head slightly darker. Length 16 mm.; forewing length 

 9.5 mm., breadth 2.3 mm. 



Head (fig. 17) relatively small; eyes moderate sized, inflated, sepa- 

 rated by an interspace three times their width; sides behind eyes two 

 and one-half eye lengths long, nearly straight, gradually covergent; 

 caudal angles abrupt, margin obtusely rounded. Mandibles A'^ery broad, 

 thick; apical dentations prominent, sharply pointed. Mentum well 

 developed, broadly triangulate. Submentum sclerotized, quadrate, 

 broader than long. Occipital foramen elongated, acutely pointed 

 apically. Ventral bridge slightly shorter than length of submentum. 

 Antennae with segments very broad, stout. 



Wings large, with rather few cross veins; venation embioid, with 

 all veins well defined nearly to terminus. Hyaline lines narrow, 

 definite. 



Hind basitarsi elongate, with only one sole-bladder. 



Terminalia (figs. 18, 19) with ninth tergite strongly asymmetrical, 

 interrupted by membranous areas, possessing a medial, darkly pig- 

 mented area on caudal margin in an upright position. Tenth tergite 



