MITES OF FALIILY CHEYLETIDAE — BAKER 301 



Woodbury; on pineapple leaves, Jamaica, at Portland, Oreg., June 

 8, 1936, by L. M. Scott ; and free-living in Takabannare Shima, an 

 island off Okinawa, June 17, 1945, by A. B. Hardcastle. 



These mites show variation in the number of dorsomedian pro- 

 podosomal setae. This variation ranges from one pair in the Okinawa 

 specimen to five pairs in the type specimen. However, of two speci- 

 mens from Puerto Kico, one has one pair of setae and the other has 

 tAvo pairs, and of the two specimens from Mexico, one has three pairs 

 and the other has four pairs of setae. 



The species is distinctive in the number of palpal claw teeth, and 

 in the type of the setae. The specimen from Jamaica possesses dorsal 

 propodosomal setae which are normally squamiform, not staghorn- 

 like. This would indicate that the staghornlike structure is an arti- 

 fact, probably due to mounting technique. This may be true of the 

 other types of setae found. 



CHEYLETIA SQUAMOSA (Degeer) 

 Plate 13, Figures 103-105 



Acarus squaniosus Degeer, Memoires pour servir a I'histoire des insectes, vol. 7, 



p. 116, pi. 7, fig. 4, 1778. 

 Cheyletia laureata Haller, Arch, fiir Naturg., vol. 1, pp. 234. 235, pi. 16, fig. 9, 



1884. — Karpelles, Math. Naturw. Ber. Ungarn., vol. 11, p. 124, pis. 18, 19, 



figs. 3, 6, 6a, 1893. 

 Cheyletus squamosa (Degeer) Oxtdemans, Tijdschr. Ent., vol. 40, pp. 126-135, 



pi. 5, 1897. — ViTZTHUM, Die Tierwelt Mitteleuropas, vol. 3, No. 3, p. 55, 



1929.— RoDENDORF, Wiss. Ber. Moskauer Staats Univ. Zool., vol. 42, p. 90, 1940. 

 Cheletia squamosa (Degeer) Oudemans, M^m. Soc. Zool. France, vol. 19, pp. 126, 



127, 1906. 



Female. — Small mite. Femur of palpus strongly elbowed on outer 

 side, with two dorsal squamiform serrate setae, the inner seta split; 

 genual seta similar and covering most of claw, located on anterior 

 portion of genu; a ventral lanceolate serrate seta present; palpal 

 claw with only five basal teeth; outer comb strong, as long as claw, 

 inner comb about three-fourths as long as claw ; sickle setae two in 

 number, normal; rodlike sensory seta on palpal tarsus. Rostrum 

 stout, peritreme simple. Body of mite covered by two shields; no 

 dorsosubmedian setae but several setal bases located; one pair of 

 lateral eyes ; four pairs of squamiform serrate setae on anterior shield 

 and six pairs on posterior shield. A pair of squamiform anal bristles, 

 other anal and genital setae simple. Legs short ; leg setae, except those 

 on tibiae and tarsi, broadly squamiform ; those on tibiae-tarsi broadly 

 lanceolate serrate. Tarsus I, 63/:^ long; tibia I, 29)U, long; tarsus I with 

 a short rodlike sensory seta. Length of body 280ju., including rostrum 

 366ja; width 213jit. 



Type habitat. — Associated with scale insects. 



Type locality. — France. 



