38 Psyche [February 



Gen. Tydeus Koch. (Eupodidae.) 

 Tydeus coccophagus sp. nov. 



Without color, being hyaline in appearance. Body and legs only sparsely 

 clothed with moderate bristles. 



Cephalothorax subconical. Eyes lateral and over twice their width from 

 the posterior margin of cephalothorax. Mouth-parts in the form of a beak, 

 and extending forward for about one-half the length of the first pair of legs. 



Abdomen two-thirds as broad as long, and with the posterior end evenly 

 rounded. A pair of small shoulder bristles present, and three pairs of bristles 

 are situated on the posterior margin of the abdomen, the outer pair being 

 slightly the longest. 



First pair of legs slightly longer than the others. Second pair reaching to 

 about the middle of the first pair. Hind pair of legs barely reaching the tip 

 of the abdomen; tarsus one and a half times as long as the tibia, tibia one and 

 a half times as long as the patella which is as broad as long. 



Length, 0.20 mm.; breadth, 0.11 mm. 



This species was found in abundance attacking the oyster 

 shell scale during the month of August, at Ames, la. The 

 individuals flee with great rapidity from under the scale when 

 it is lifted with a knife-blade. 



Gen. Harpyrhynchiis Megnin. (Cheyletidse.) 

 Harpyrhynchus brevis sp. nov. (PI. 7, fig. 4). 



General appearance hyaline. Integument finely striated by concentric 

 lines for a large zone next to the margins of the body. This striated area 

 extends inward for about one-half the distance from the margin to the center 

 of the body. 



Beak large, stout, extending forward to about the tip of the first pair of 

 legs. Dorsal hooks four in number, stout and strongly recurved. Each 

 palpus bears a very long bristle about equal to the total length of the beak. 



Body circular in outline with sinuate margins. On the dorsal surface near 

 the base of the beak there is a large pair of posteriorly directed bristles which 

 extend almost to the posterior margin of the body; a similar but slightly 

 longer pair of lateral bristles is present just behind the second pair of legs. 



Anterior group of legs stout, subequal, and terminated each with two 

 claws; tibia and tarsus subequal in length, the former somewhat broader than 

 the latter. Posterior group of legs very short and each terminated with from 

 five to seven enormous bristles which are longer than the body of the mite. 

 The last pair of legs extends to the margin of the abdomen. 



Length, 0.28 mm.; breadth, 0.24 mm. 



From Coccothraustes vespertina cf. Described from three 

 specimens. 



